diff --git a/Doc.md b/Doc.md
index 9aff5ba..5db669e 100644
--- a/Doc.md
+++ b/Doc.md
@@ -12,7 +12,6 @@
  * [the release notes]source:relnotes.txt@864 announcing the third public release on June 29, 2007, including the new mutable, shareable, private directories
 
 ## Detailed Design Docs
- * [TahoeIssues](TahoeIssues)/FileTree, explaining how mutable, shareable, private directories are implemented (which requires interesting crypto)
  * [TahoeIssues](TahoeIssues)/FileEncoding, explaining how we turn files into shares, with verifiable hashes; This is mostly concerned with chunking and Merkle trees.
  * [TahoeIssues](TahoeIssues)/ShareEncoding, explaining how we turn a chunk into shares: Reed-Solomon, FEC, that stuff