On 12th May 1917, 6 O.Rís were working in a dressing station at the Asylum when a shell made a direct hit and went down the back stairs killing 4 and wounding 2 of them. Daniel was one of the 4 killed, the others were
88007 Pte A C Caunt, 90749 Pte W M Timpson and 72048 Pte H Tillyard who died on arrival at the Casualty Clearing Station. The 2 wounded were 65127 S/Sjt J H Smith and 69593 Pte A B Clarke. Daniel was the son of Patrick and Sarah Boyle of Glasgow.