Where was John Surratt on April 14, 1865 ?

[JMadonna]

On p. 6 of the latter source, Miss Porterfield is quoted as saying that on the morning of the 13th she met Booth on Pennsylvania Avenue, apparently by chance, and that part of their conversation involved his asking her how one spelled "tyrannis", with two n's or two r's.

Curious as to why he would ask such a question, unless he included it in his letter to the editor that was burned. Also, Booth was playing the role of a 'tar baby' implicating everyone he could which may be the reason he implicated Surratt in the conversation.