Board Thread:Warhammer 40k General Discussion/@comment-69.143.134.163-20150419161351/@comment-25451195-20160426162648

a moderator on this page 2 years ago talked to me about Malcador's chair... Malcador was part of an organization that's job was to remember things as I recall.

Additionally, the dude is HIS #2 man, there is a likelihood that Malcador was seriously involved in the actions in regards to those two Primarchs (being that he is involved in everything that HE is involved in)

also, Malcador placed those symbols in a location he would see everyday, for purposes we can only guess at, but he does not want to forget the individuals, or their circumstances, as the saying goes "those who forget history, are doomed to repeat it"