Page:Canadian Alpine Journal I, 1.djvu/217

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Our work here has been on the same lines as on the Illecillewaet, though our observations have not been as continuous, and no map was made and no attempt to measure the rate of flow till 1906.

As respects recession, this glacier has shown more changes than some of the others. In 1901, a distinct advance occurred which lasted for about three years. Then recession again ensued. Our series of observations was somewhat interfered with, because the large boulders in the moraine, which were employed to mark our datum line, were shoved forward by the ice in its advance, entirely obliterating the primary base line for our measurements.