1917 Ypres tench map/signal lines

[mikecharles49]

Could anyone please let me have a copy of a 1917 trench map for the Armagh Wood/Mount Sorrel area, east of Ypres just south of Sanctuary Wood and Observatory Ridge which should show artillery siege battery telephone lines to FOOs and Larch Wood signalling station.  Shrewsbury Forest, Zwarteleen , Battle Wood etc will be shown too.  The map should  be under X Corps, 39th Division.    In late September 1917, my grandfather's 295 Siege battery was at map sheet 28  ref I.30.a.7.4, and as a signaller  was working on repair to telephone lines when KIA 26/9/1917.

Many thanks.  Mike.

[sotonmate]

This is likely what you need to look at, but it is at Kew and the sheets vary in size from large to very large:

http://discovery.nationalarchives.gov.uk/details/r/C4463066