IN MEMORY OF
ROBERT DENNIS TRIBE
AGE 17, OF NORTH VANCOUVER, B. C.
WHO AT 3:15 P.M. SUNDAY, JUNE 5, 1966
FAILED TO NOTICE IT WAS LOW TIDE
AND DIVED TO HIS DEATH FROM
SIWASH ROCK TO THE ROCKS BELOW
THIS PLAQUE ERECTED
BY BOB'S FRIENDS AS A REMINDER OF THE DANGER
OF DIVING FROM SIWASH ROCK
Submitted by @CWKopp
Siwash Rock:
There is another plaque near Siwash Rock (via Wikipedia):