334 DISCOVERY REPORTS 



level, and at the landward side of this a rocky somewhat flat-topped hummock or hum- 

 mocks, with vertical sides and covered by tussac. It occurred to me that all these 

 hummocks were almost the same height, that is, 80 or 90 ft. The weathering of the 

 stones is of course caused by the action of sea water and assisted by freezing and 

 thawing. The height of the hummocks is affected by the amount of tussac, and this 

 might account for the difli'erence of 10 ft. or so that was observed. It is suggested that 

 these hummocks were at some period at water-level and were raised fairly suddenly, 

 thus accounting for the steep sides and nearly equal heights. I regret to say that I know 

 nothing of geology, so make this suggestion with great diffidence. The photograph of 

 Cape George (Plate XLIII, fig. 3) illustrates the feature to which I refer. 



SURVEY WORK IN R.R.S. 'WILLIAM SCORESBY', APRIL 14-19, 1930 



We proceeded south from King Edward Cove on Tuesday morning, April 15, going 

 inside all the rocks, through the channel we had surveyed the year before, and so testing 

 practically the work already carried out. We then entered Godthul and thereafter tried 

 to find the Nansen Bank. Owing to the serious inaccuracy of the chart, and the fact that 

 the sea was comparatively calm and thus did not break on the bank, we did not succeed. 

 We abandoned the attempt for the time being, as the conditions were so unfavourable, 

 and went on to the Clerke Rocks instead. There we were favoured by luck, for just as 

 we came near enough to see them at dusk that evening, the sky cleared and enabled me 

 to observe several stars. At the same time some bearings of the main rock with run 

 between were taken : this enabled us to fix the rocks effectively. We lay off for the night 

 and carried out a running survey next morning. This turned out satisfactorily. The 

 charted position of the rocks was appreciably incorrect, and their coast-line entirely 

 diff"erent. 



On completion, we shaped course for Larsen Harbour (Plate XLIV, fig. i), where the 

 night was spent. Next morning a sketch of the coast was made from Larsen Harbour to 

 Green Islands, and a run up the coast was carried out for the proposed checking of the 

 positions of Pickersgill and Annenkov Islands. This was done by log distance from 

 Green Islands to Wilson Harbour and compass course and bearing, and showed them 

 to be charted very nearly correctly. 



Wilson Harbour was reached after dark, and the night was spent there. Next day, 

 after a quick sketch to verify the previously made sketch survey, course was shaped to 

 pass through Stewart Strait, between Willis and Bird Islands. Two new patches of kelp 

 were fixed to the north of Bird Island (Milward Patches), and Elsehul was entered. 

 Course was then shaped to examine the area west of Welcome Rocks, but nothing was 

 observed, possibly owing to the small swell. 



After one or two soundings and a tour round the Bay of Isles, it was decided that no 

 useful purpose would be served by staying out the night, and we therefore returned to 

 Grytviken. 



Next day we resumed the search for the Nansen Bank. In this attempt we had the 

 kind assistance of Captain Esbensen, Manager of the Cia. Argentina de Pesca's Station 



