User blog comment:Pawn of Atlas/Important Discussion for Rapture Storyline page/@comment-1500935-20140403184252/@comment-75.36.136.124-20140406093140

The_Pair_Bond_Mechanism

"The first successful candidate was... Delta, I believe. It is unfortunate that poor Dr. Suchong will not be here to raise a glass"

He 'believes' and has a doubt (too many to keep track of possibly ).. and so maybe it was 'Theta' instead. Delta with Eleanor may have only been a partial, problematic (not quite successful) bonding (which had ended suddenly with Delta's being killed and Eleanor disappearing)....

And the recording could be later when this 'Theta' test finally was a success.