British Mk IV tank "CONQUEROR II" C47 in Fontaine-Notre-Dame, where it was knocked out on 23/11/17 Letter on reverse (below) kindly translated by xiphophilos: dated 31 March 1918 and sent to his brother, the author writes of a dire need for truck drivers and how the army horses have nothing to eat.
Land Excavating Trenching aka White Rabbit No. 6 Cultivator No. 6 or Nellie. This machine was an underground tank developed in and designed to travel across "no-man's-land" in a trench of its own making cutting a trench 7 ft 6 in m) wide and 5 ft m) deep.