I’ve been playing with http://rdf.muninn-project.org/TrenchCoordinates.html?q=50.379380,2.774023 to update the co-ordinates from the AIF 4th Btn Diary onto this Google map for cousin Spencer Parkes’ last days, he was D Coy. If you click on the markers there should be some info’. But I am still tempted to buy Linesman maps for this area!