I will conclude the accounts of typical submarine _v._ submarine
engagements by the case of "E 34" (Lieutenant Pulleyne) and a U-boat
off Harwich on the 10th May 1918.
"E 34" was returning to harbour after a trip. She was actually in the
swept channel leading into Harwich, and could pretty well take it for
granted that any vessel met with so near home would be friendly. As
boats get near their base it is usual to begin the cleaning-up work
which is so necessary after a trip, and to get ready generally for
harbour routine again. "E 34" saw a submarine ahead steering north,
and, treating her as hostile until her identity could be established,
dived at once to attack. Fifteen minutes later Lieutenant Pulleyne, in
no doubt at all about what his target's nationality was, fired both bow
tubes and sank her. He then rose, and proceeded to pick up the only
survivor, who happened to be the captain, and who was in pretty bad
condition from shock and immersion.