Booth's mistress, Ella Starr, and other "unknown" Booth ladies!

[Steve]

Could the "Sam" in the Etta letter be a reference to Samuel Chester?

PS Annie who is acting the maid to perfection, wishes to be remembered to her dear. Ahem!!! Sam

That postscript is weird, whatever its purpose was supposed to be. If Booth really did orchestrate the "Etta letter", then it might make sense to mention Chester if he thought his drunken conversation with Chester on the 8th would become known to authorities after the assassination. A little nugget of authenticity that would make authorities second guess any decision to ignore it?