Churchill had calmly faced death so many times in the Royal Hussars in India and the Sudan, as a war correspondent in Cuba and S. Africa, and in the trenches of WWI after retiring from the Admiralty following the Gallipoli disaster that for him this must have been just another excursion to the edge. A risk taker and a real man.
Well the still full water glass is the one next to the sugar bowl at the right. Notice well the two empty glasses at the left with a small amount of darker liquid at the bottoms. Note also the ripple in the table covering like an outgoing tide as the empties were pushed to the side. Odd thing that the glasses are progressively less wide, with the narrowest in his hand. Teacup dismissed to stand against the wall.
IIRC Sir Winston retired each night of the war with a bottle of brandy and a cigar.
BTW as I understand it colonial officers never mixed spirits with unreliable local water.
Yes indeed, a risk taker and a real man. He drank like a fish, smoked like a chimney, ate what he wanted when he wanted, was in all manner of death defying situations, and lived to be 91. Well done Mr. Churchill!