Puerto Rico: 1857, folded cover to Rivadeo, Spain, franked with 1/2r p deep greenish blue, mostly large margins, just touching at upper right, tied to folded cover by oval obilterator, postmarked with blue "Admon. Gral Puerto Rico” double-circle c.d.s. (29 Nov), conveyed to the British Post Office, with “SAN-JUAN-PORTO-RICO” double-arc backstamp (29 Nov) and fine “PAID AT SAN JUAN PORTO RICO” Crown circle on front, red “1/11” single-weight rate notation, red British PAID c.d.s. (18 Dec), “ANGL AMB CALAIS” c.d.s. entry mark (19 Dec), Paris (19 Dec) and Rivadeo (26 Dec) backstamps, some trivial edge flaws, small portion of outer sheet missing, else fine.
