1861, two Post Office cancellation Proof sheets, each measuring 10in.x16in., the first headed "MORNING", the other "EVENING", showing examples of 68 and 57 different types or codes of London cancellations respectively, types include "FREE", "REGISTERED", "POSTED SINCE/7 LAST NIGHT", "TOO LATE", "PAID", etc., all dated 15 or 16 Feb., each folded through centre and with hinge strengthening, fine and attractive