usual care as he jiggled off the 'cans.'

"One of the detonations had a different kick from the others, and I was
just speculating if it had been a hit, when up comes Fritz, rolling like
a harpooned whale.

"We were just turning sharp under left rudder and, not wanting to take
any chances, the captain gave orders for all guns fearing to open fire.
No. 1 and No. 2 of the port battery got off about five rounds apiece,
and when the splashes from the exploding shells had subsided Fritz had
gone. It looked like a hundred to one that we had finished him--until we
ran into another of those darn wakes of oil and bubbles reeling off at
a good five or six knots.

"Again we 'canned' him, and again the thickening trail of grease gave
promise that, if nothing else, we were at least bleeding him hard,
perhaps to death. As there was no doubt that he was still a going
concern, however, the captain decided on a change of tactics, to try
attrition, so to speak, instead of direct assault.

"There is, of course, a limit to the number of 'cans' a destroyer can
carry, and those which still remained he wanted to husband against a
better chance to use them with effect. The several remaining hours of
daylight would be enough, if the U-boat could be kept running at maximum
speed, to exhaust its batteries in and force it to come to the surface
for lack of power to keep going submerged. A submarine, you understand,
unless it can lie on the bottom, which was impossible here on account of
the depth, must keep under weigh to maintain its bouyancy, so it follows
that the exhaustion of its batteries leaves no alternative but coming
up. That was what we were now driving at with this one.

"About this time, hearing the radio of the _Cushman_ close aboard, the
captain sent a signal requesting her help in clearing up the job in
hand. She hove in sight presently, accompanied by the _Fanny_, which was
out with her on some special stunt of their own. They had an hour to
spare for us, and in that time we played just about the merriest little
game of hide-and-seek that any of our destroyers have had with a Fritz
since the Yanks came over.

"He wasn't left time to sit and think for a single minute. Now a
destroyer would come charging up his wake from astern and shy a 'can' at
his tail; now one would ambush him from ahead and try and have one
waiting where his nose was going to be.

"It was a good deal like when three or four of us kids used to spear
cat