had to lie down inserted: for a time whilst it was going on. Our trenches were shelled and bombarded on the right section very heavily during the day. Telephone lines were nearly always out of working order, & could not be repaired until dark. I have arranged a rocket signal with the Officer Commanding Royal Artillery? for night. It is worked by rays one look out man at the centre pole has his strings aligned on the sections of the front; if the rockets are fired from the trenches at night he telephones to the battery to open fire on the section concerned. These strings are aligned by day, & are fixed to