An article about Lincoln which does not mention Speed is just pure censorship.  Speed was his closest, most intimate friend, as they both state many times in their letters.  The sole possible reason for excising Speed is censorship of this part of his life.  That isn't acceptable.  No historian of Lincoln would find that acceptable.  In fact there is no history of Lincoln whatsoever which excises Speed.  If you can find one, post it.  The sources are clear that he was his most intimate friend.