-Same articles at <<DA>> are a narrative of the history of the
-game. There is an in-depth study of its origins at <<SN>>.
-Many versions are collected at The Interactive Fiction Archive
-<<IFA>>; note however that its dates for the earliest releases
-don't match other comments in the code or the careful reconstruction
-in <<SN>>.
-
-Future versions of this document may attempt to untangle some of the
-non-mainline history. For now, it will suffice to explain the chain of
-provenance that led from the original Adventure to the version
-distributed with this document.
+Same articles at <<DA>> are a narrative of the history of the game.
+There is an in-depth study of its origins at <<SN>>. Many versions
+are collected at The Interactive Fiction Archive <<IFA>>; note however
+that IFA's historical claims are thinly sourced and its dates for the
+earliest releases don't match either comments in the code or the
+careful reconstruction in <<SN>>.
+
+An attempt to untangle and document a lot of the non-mainline history
+has been made by Arthur O'Dwyer at <<QUUX>>. For our purposes, it
+will suffice to explain the chain of provenance that led from the
+original Adventure to the Open Adventure distributed with this
+document.