Difficulty was experienced at all times in sounding owing to the extraordinary liveliness of the _Quest_, and many more soundings would have been taken but for the slowness of the vessel, lateness of the season, limited time and bad weather. A number of heights in the Tristan da Cunha, Gough Island group, were ascertained by Captain G. V. Douglas with an aneroid to be marked in excess on the Admiralty charts. The new heights as determined by him and compared with those in Admiralty charts are: BY BY ADMIRALTY DOUGLAS CHART 2228 FEET. FEET. Tristan da Cunha 6,400 7,640 Middle Island 200 150 Inaccessible Island 1,508 1,840 Gough Island 2,915 4,380 It will be noted that an increase is to be applied to the Admiralty height of Middle Island only. APPENDIX V MEDICAL By A. H. MACKLIN, M.D. _The following is intended to give briefly an idea of the special conditions met with in Antarctic regions and the steps taken for the prevention of disease._ The chief work of the surgeon of a polar expedition is done before the ship leaves England, and if it has been properly carried out there should be little to do during the actual journey. In this respect casualties are excepted, for naturally they cannot be foreseen. They are prepared for by providing a good general surgical outfit, the exact composition of which will depend upon the amount of money available for its purchase and on the space at disposal for its storage. Also, as the practice of medicine and surgery is more of an art than an exact science, it will depend largely upon the individual surgeon. Many things can be omitted; for example, splints, which can be improvised as required. There are, however, definite lines upon which the prevention of sickness may be carried out, and the following are important points:—