diff --git a/Doc.md b/Doc.md
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+++ b/Doc.md
@@ -22,12 +22,15 @@ These docs are stored in the source tree, under revision control.  You can brows
 ## Developer Wiki Pages
  * [UseCases](UseCases): the ways in which Tahoe should be useful
  * [Security](Security): known security issues and workarounds
- * [FileEncoding](FileEncoding), explaining how we turn files into shares, with verifiable hashes; This is mostly concerned with chunking and Merkle trees.
  * [ShareEncoding](ShareEncoding), explaining how we turn a chunk into shares: Reed-Solomon, FEC, that stuff
  * [PeerSelection](PeerSelection), explaining how a Tahoe node chooses which other nodes to use for uploading and downloading files (which raises some unsolved issues in balancing scalability, robustness, performance, and simplicity)  
  * [ChangingFilesWhileCopyingThem](ChangingFilesWhileCopyingThem) : what are the semantics of the "upload" action? the upload takes
    non-zero time: what happens if the file is changed during that time?
 
+## Obsolete Docs
+These docs are here in case someone wants to copy out the parts that are still relevant before deleting them.
+ * [FileEncoding](FileEncoding), explaining how we turn files into shares, with verifiable hashes; This is mostly concerned with chunking and Merkle trees.
+
 ## See Also
  * [The News page](News) for sources of news and information.
  * [The Bibliography page](Bibliography) contains links to scientific papers of interest.