[Dianaa]

Originally Posted by klambie

Might try the collection at McMaster University in Hamilton.

http://library.mcmaster.ca/maps/ww1/home.htm

Kevin

Amazing help!

Mcmaster University has a page dedicated to the map references. http://library.mcmaster.ca/maps/ww1/MapRefNo.htm

Originally Posted by Dianaa

..... In the unit diary, the grid references are further reduced to a secondary alpha numeric code. You will see a trench in grid square J 35, If I am correct this is described as J.35.B.18.82 in the diary. ...

The only remaining issue is that the McMaster references describe the last two single digits representing tenths up and across the grid square where the 19 Fld Coy RAE diary describes paired digits which I can only assume to be hundreths of the square required for the more accurate needs of the engineers.

Diana