Greg,
Any army signal flags in the 1862 production book? I've been speculating that Porter Alexander's first efforts (cJul 1861) were directly arranged, before the Sig Corps became official in Apr-May 62, with increased supply needed with additional commissions (1st/2nd Lts) awarded in Sep. Since Alexander's commission was as engineer, I have wondered if there might be record of initial outlays in engineer records before SigC became official and separate.