I did a quick search here and could not find this listed so I hope this is not a repeat.
A PDF of the handwritten notes of Cpl. H Ranyer (?) 2/5 Queens entitled Trench Warfare Notes, January 1915. With some period diagrams of grenades, grenade launchers, mortars etc.
http://www.forgottenweapons.com/wp-content/uploads/2016/06/Trench Warfare Notes 1915.pdf
Brian
A PDF of the handwritten notes of Cpl. H Ranyer (?) 2/5 Queens entitled Trench Warfare Notes, January 1915. With some period diagrams of grenades, grenade launchers, mortars etc.
http://www.forgottenweapons.com/wp-content/uploads/2016/06/Trench Warfare Notes 1915.pdf
Brian