Chapter 6 40B. 40C. 40D.

In this connection may also be mentioned the various marks used on letters sent by prisoners of war in charge of the British military authorities at home and abroad. An old type of prisoner-of-war mark dated 1800 is illustrated in Fig. 41, from "Pre-Victorian Postage Stamps and Franks" by Mr. G. A. Foster.[4]

[4] London. 1910: Charles Nissen & Co.