Margaret E Macculloch & David J Hall Family History Research - Harold Hayes’ Canadian Forces Map of Vimy Ridge, given to him prior to his Battalion’s assault of April 1917.On the back of the map Harold has diagrammed different sizes of enemy tranches, along with instructions on how, as an engineer, he should deal with them: from a single Mills bomb for the smallest to flooding with water for the largest.(By kind permission of D Lovell)

Harold Hayes’ Canadian Forces Map of Vimy Ridge, given to him prior to his Battalion’s assault of April 1917.
On the back of the map Harold has diagrammed different sizes of enemy tranches, along with instructions on how, as an engineer, he should deal with them: from a single Mills bomb for the smallest to flooding with water for the largest.

(By kind permission of D Lovell)