two folded letters from Arroyo, Puerto Rico to Lanman & Kemp in New York City, first with "New London Con Mar 4 1863" double circle datestamp and matching straightline "Ship" and "5" handstamps; second with ""New London Con 13 Jan 1864" double circle datestamp and matching "Ship" in oval and "Due 6" handstamps, very fine pair with a nice assortment of markings