Hi Di, Do you have the letters and if so what are the postal markings on the front and the back? The Downs is a naval Anchorage and refers to an area stretching from Dover to the London Surrey border but in this instance probably refers to the area off of the Medway towns or possibly Dover. Ships would wait here fopr a favourable wind to take them down the English Channel. Get hold of the postal markings and I can tell you more about them. Mike Waterlooville **************