Our President in 1974/5 was:
The Right Hon. Lord Tweedsmuir, CBE, CD, LL.D
He proposed the Toast to Sir Walter at our 67th Annual Dinner on Friday 7th March 1975 in The North British Hotel, Edinburgh
Read the text of his address here
William James de L'Aigle Buchan, 3rd Baron Tweedsmuir (10 January 1916 - 29 June 2008), also known as "William Tweedsmuir", was an English peer and author of novels, short stories, memoirs and verse. He was the second son of the writer and Governor General of Canada, John Buchan.
Text source: Wikipedia