9 a.m.
To my consternation I discovered our relentless pursuer about 1,500 metres away on the port quarter . In some extraordinary manner he had tracked us during the night . I dived and altered course through ninety degrees to south . At 9 a.m. a tremendous explosion shook the boat from stem to stern , smashing several lights , and giving her a big inclination up by the bow . As I was only at twenty metres I feared the boat would break surface , and our enemy was evidently very nearly right over us . I at once ordered hard to dive , and went down to the great depth of ninety-five metres . A series of shattering explosions somewhere above us showed that we were marked down , and we were only saved from destruction by our great depth , the English charges being set apparently to about thirty metres .