diff --git a/src/Pure/General/mailman.scala b/src/Pure/General/mailman.scala
--- a/src/Pure/General/mailman.scala
+++ b/src/Pure/General/mailman.scala
@@ -1,344 +1,350 @@
 /*  Title:      Pure/General/mailman.scala
     Author:     Makarius
 
 Support for Mailman list servers.
 */
 
 package isabelle
 
 
 import java.net.URL
 
 import scala.annotation.tailrec
 import scala.util.matching.Regex
 import scala.util.matching.Regex.Match
 
 
 object Mailman
 {
   /* mailing list messages */
 
   sealed case class Message(
     name: String,
     date: Date,
     title: String,
     author_name: String,
     author_address: String,
     body: String)
   {
     def print: String =
       name + "\n" + date + "\n" + title + "\n" +
       quote(author_name) + "\n" + "<" + author_address + ">\n"
   }
 
   def message_match(lines: List[String], re: Regex): Option[Match] =
     lines.flatMap(re.findFirstMatchIn(_)).headOption
 
   class Message_Chunk(bg: String = "", en: String = "")
   {
     def unapply(lines: List[String]): Option[List[String]] =
     {
       val res1 =
         if (bg.isEmpty) Some(lines)
         else {
           lines.dropWhile(_ != bg) match {
             case Nil => None
             case _ :: rest => Some(rest)
           }
         }
       if (en.isEmpty) res1
       else {
         res1 match {
           case None => None
           case Some(lines1) =>
             val lines2 = lines1.takeWhile(_ != en)
             if (lines1.drop(lines2.length).isEmpty) None else Some(lines2)
         }
       }
     }
 
     def get(lines: List[String]): List[String] =
       unapply(lines) getOrElse
         error("Missing delimiters:" +
           (if (bg.nonEmpty) " " else "") + bg +
           (if (en.nonEmpty) " " else "") + en)
   }
 
   object Address
   {
     def anchor(s: String): String = """<a href="[^"]*">""" + s + """</a>"""
     def angl(s: String): String = """&lt;""" + s + """&gt;"""
     def quot(s: String): String = """&quot;""" + s + """&quot;"""
     def paren(s: String): String = """\(""" + s + """\)"""
     val adr = """([^<>]*? at [^<>]*?)"""
     val any = """([^<>]*?)"""
     val spc = """\s*"""
 
     val Name1 = quot(anchor(any)).r
     val Name2 = quot(any).r
     val Name_Adr1 = (quot(anchor(any)) + spc + angl(anchor(adr))).r
     val Name_Adr2 = (quot(any) + spc + angl(anchor(adr))).r
     val Name_Adr3 = (anchor(any) + spc + angl(anchor(adr))).r
     val Name_Adr4 = (any + spc + angl(anchor(adr))).r
     val Adr_Name1 = (angl(anchor(adr)) + spc + paren(any)).r
     val Adr_Name2 = (anchor(adr) + spc + paren(any)).r
     val Adr1 = angl(anchor(adr)).r
     val Adr2 = anchor(adr).r
 
     def trim(s: String): String = HTML.input(s).replace(" at ", "@")
 
     def unapply(s: String): Option[(String, String)] =
       s match {
         case Name1(a) => Some((trim(a), ""))
         case Name2(a) => Some((trim(a), ""))
         case Name_Adr1(a, b) => Some((trim(a), trim(b)))
         case Name_Adr2(a, b) => Some((trim(a), trim(b)))
         case Name_Adr3(a, b) => Some((trim(a), trim(b)))
         case Name_Adr4(a, b) => Some((trim(a), trim(b)))
         case Adr_Name1(b, a) => Some((trim(a), trim(b)))
         case Adr_Name2(b, a) => Some((trim(a), trim(b)))
         case Adr1(a) => Some(("", trim(a)))
         case Adr2(a) => Some(("", trim(a)))
         case _ => None
       }
   }
 
 
   /* mailing list archives */
 
   abstract class Archive(
     url: URL,
     name: String = "",
     tag: String = "")
   {
     def message_regex: Regex
-    def message_content(href: String, lines: List[String]): Message
+    def message_content(name: String, lines: List[String]): Message
 
     private val main_url: URL =
       Url(Library.take_suffix[Char](_ == '/', Url.trim_index(url).toString.toList)._1.mkString + "/")
 
     private val main_html = Url.read(main_url)
 
     val list_name: String =
     {
       val title =
         """<title>The ([^</>]*) Archives</title>""".r.findFirstMatchIn(main_html).map(_.group(1))
       (proper_string(name) orElse title).getOrElse(error("Failed to determine mailing list name"))
     }
     override def toString: String = list_name
 
+    def full_name(href: String): String = list_name + "/" + href
+
     def list_tag: String = proper_string(tag).getOrElse(list_name)
 
     def read_text(href: String): String = Url.read(new URL(main_url, href))
 
     def hrefs_text: List[String] =
       """href="([^"]+\.txt(?:\.gz)?)"""".r.findAllMatchIn(main_html).map(_.group(1)).toList
 
     def hrefs_msg: List[String] =
       (for {
         href <- """href="([^"]+)/date.html"""".r.findAllMatchIn(main_html).map(_.group(1))
         html = read_text(href + "/date.html")
         msg <- message_regex.findAllMatchIn(html).map(_.group(1))
       } yield href + "/" + msg).toList
 
     def get(target_dir: Path, href: String, progress: Progress = new Progress): Option[Path] =
     {
       val dir = target_dir + Path.basic(list_name)
       val path = dir + Path.explode(href)
       val url = new URL(main_url, href)
       val connection = url.openConnection
       try {
         val length = connection.getContentLengthLong
         val timestamp = connection.getLastModified
         val file = path.file
         if (file.isFile && file.length == length && file.lastModified == timestamp) None
         else {
           Isabelle_System.make_directory(path.dir)
           progress.echo("Getting " + url)
           val bytes =
             using(connection.getInputStream)(Bytes.read_stream(_, hint = length.toInt max 1024))
           Bytes.write(file, bytes)
           file.setLastModified(timestamp)
           Some(path)
         }
       }
       finally { connection.getInputStream.close() }
     }
 
     def download_text(target_dir: Path, progress: Progress = new Progress): List[Path] =
       hrefs_text.flatMap(get(target_dir, _, progress = progress))
 
     def download_msg(target_dir: Path, progress: Progress = new Progress): List[Path] =
       hrefs_msg.flatMap(get(target_dir, _, progress = progress))
 
     def download(target_dir: Path, progress: Progress = new Progress): List[Path] =
       download_text(target_dir, progress = progress) :::
       download_msg(target_dir, progress = progress)
 
     def trim_title(str: String): String =
     {
       val Trim1 = ("""\s*\Q[""" + list_tag + """]\E\s*(.*)""").r
       val Trim2 = """(?i:(?:re|fw|fwd)\s*:\s*)(.*)""".r
       val Trim3 = """\[\s*(.*?)\s*\]""".r
       @tailrec def trim(s: String): String =
         s match {
           case Trim1(s1) => trim(s1)
           case Trim2(s1) => trim(s1)
           case Trim3(s1) => trim(s1)
           case _ => s
         }
       trim(str)
     }
 
     def trim_name(str: String): String = str.replaceAll("""\s+""", " ")
 
     def get_messages(): List[Message] =
       for (href <- hrefs_msg) yield message_content(href, split_lines(read_text(href)))
 
     def find_messages(dir: Path): List[Message] =
     {
       for {
         file <- File.find_files(dir.file, file => file.getName.endsWith(".html"))
         rel_path <- File.relative_path(dir, File.path(file))
-      } yield message_content(rel_path.implode, split_lines(File.read(file)))
+      }
+      yield {
+        val name = full_name(rel_path.implode)
+        message_content(name, split_lines(File.read(file)))
+      }
     }
   }
 
 
   /* Isabelle mailing lists */
 
   object Isabelle_Users extends Archive(
     Url("https://lists.cam.ac.uk/pipermail/cl-isabelle-users"),
     name = "isabelle-users", tag = "isabelle")
   {
     override def message_regex: Regex = """<li><a name="\d+" href="(msg\d+\.html)">""".r
 
     private object Head extends
       Message_Chunk(bg = "<!--X-Head-of-Message-->", en = "<!--X-Head-of-Message-End-->")
 
     private object Body extends
       Message_Chunk(bg = "<!--X-Body-of-Message-->", en = "<!--X-Body-of-Message-End-->")
 
     private object Date_Format
     {
       private val Trim1 = """\w+,\s*(.*)""".r
       private val Trim2 = """(.*?)\s*\(.*\)""".r
       private val Format =
         Date.Format(
           "d MMM uuuu H:m:s Z",
           "d MMM uuuu H:m:s z",
           "d MMM yy H:m:s Z",
           "d MMM yy H:m:s z")
       def unapply(s: String): Option[Date] =
       {
         val s0 = s.replaceAll("""\s+""", " ")
         val s1 =
           s0 match {
             case Trim1(s1) => s1
             case _ => s0
           }
         val s2 =
           s1 match {
             case Trim2(s2) => s2
             case _ => s1
           }
         Format.unapply(s2)
       }
     }
 
     override def trim_name(str: String): String =
     {
       val Trim = """(.*?)\s*via\s+Cl-isabelle-users""".r
       super.trim_name(str) match {
         case Trim(s) => s
         case s => s
       }
     }
 
-    override def message_content(href: String, lines: List[String]): Message =
+    override def message_content(name: String, lines: List[String]): Message =
     {
       def err(msg: String = ""): Nothing =
-        error("Malformed message: " + href + (if (msg.isEmpty) "" else "\n" + msg))
+        error("Malformed message: " + name + (if (msg.isEmpty) "" else "\n" + msg))
 
       val (head, body) =
         try { (Head.get(lines), Body.get(lines)) }
         catch { case ERROR(msg) => err(msg) }
 
       val date =
         message_match(head, """<li><em>Date</em>:\s*(.*?)\s*</li>""".r)
           .map(m => HTML.input(m.group(1))) match
         {
           case Some(Date_Format(d)) => d
           case Some(s) => err("Malformed Date: " + quote(s))
           case None => err("Missing Date")
         }
 
       val title =
         HTML.input(message_match(head, """<li><em>Subject</em>:\s*(.*)</li>""".r)
           .getOrElse(err("Missing Subject")).group(1))
 
       val (author_name, author_address) =
         message_match(head, """<li><em>From</em>:\s*(.*?)\s*</li>""".r) match {
           case None => err("Missing From")
           case Some(m) => Address.unapply(m.group(1)) getOrElse err("Malformed From")
         }
 
       Message(
-        href, date, trim_title(title),
+        name, date, trim_title(title),
         trim_name(proper_string(author_name) getOrElse author_address),
         author_address,
         cat_lines(body))
     }
   }
 
   object Isabelle_Dev extends Archive(Url("https://mailmanbroy.in.tum.de/pipermail/isabelle-dev"))
   {
     override def message_regex: Regex = """<LI><A HREF="(\d+\.html)">""".r
 
     private object Head extends Message_Chunk(en = "<!--beginarticle-->")
     private object Body extends Message_Chunk(bg = "<!--beginarticle-->", en = "<!--endarticle-->")
 
     private object Date_Format
     {
       val Format = Date.Format("E MMM d H:m:s z uuuu")
       def unapply(s: String): Option[Date] = Format.unapply(s.replaceAll("""\s+""", " "))
     }
 
-    override def message_content(href: String, lines: List[String]): Message =
+    override def message_content(name: String, lines: List[String]): Message =
     {
       def err(msg: String = ""): Nothing =
-        error("Malformed message: " + href + (if (msg.isEmpty) "" else "\n" + msg))
+        error("Malformed message: " + name + (if (msg.isEmpty) "" else "\n" + msg))
 
       val (head, body) =
         try { (Head.get(lines), Body.get(lines)) }
         catch { case ERROR(msg) => err(msg) }
 
       val date =
         message_match(head, """\s*<I>(.*)</I>""".r).map(m => HTML.input(m.group(1))) match {
           case Some(Date_Format(d)) => d
           case Some(s) => err("Malformed Date: " + quote(s))
           case None => err("Missing Date")
         }
 
       val (title, author_address) =
       {
         message_match(head, """TITLE="([^"]+)">(.*)""".r) match {
           case Some(m) => (HTML.input(m.group(1)), Address.trim(HTML.input(m.group(2))))
           case None => err("Missing TITLE")
         }
       }
 
       val author_name =
         message_match(head, """\s*<B>(.*)</B>""".r) match {
           case None => err("Missing author")
           case Some(m) => HTML.input(m.group(1))
         }
 
       Message(
-        href, date, trim_title(title),
+        name, date, trim_title(title),
         trim_name(proper_string(author_name) getOrElse author_address),
         author_address,
         cat_lines(body))
     }
   }
 }