Board Thread:Warhammer 40k General Discussion/@comment-50.148.108.250-20131120014509

http://warhammer40k.wikia.com/wiki/Primarch - The order of rediscovery (a quarter way down the page)

This page states the the XI legion primarch was discovered after the XIX legion primarch Covus Corax.

http://warhammer40k.wikia.com/wiki/Lost_Primarchs -The quote (half way down the page)

Yet during the first meeting of The Emperor and Covus, The Emperor says  " The other two ," he said. " ''That is a conversation for another day." ''

This revelation indicates that the missing II and XI Legions were already lost and possibly expunged from all Imperial records by the time Corax was reunited with the Emperor on Lycaeus. 