Frank and Percy Talley of the 1st City of London Yeomanry (Rough Riders) were destined to leave England to take part in the last, and most costly, single-day battle of the Gallipoli Campaign, on 21 August 1915. In never-before published letters, the Talley brothers describe their training in England and their move to the East Coast to man the trenches there during the invasion scare of 1914 and th...