under 7 or 8 in.

of snow.

This ice had been slightly thicker in the early part of September, and I assumed that some melting had begun below.

Clark had recorded plus temperatures at depths of 150 and 200 fathoms in the concluding days of September.

The ice obviously had attained its maximum thickness by direct freezing, and the heavier older floes had been created by the consolidation of pressure-ice and the overlapping of floes under strain.