Regarding the answer to the proverb BWNMIHS I also think that it should be butter would not melt in his mouth. I would contact the setter, it is not admitting defeat. We all are human and mistakes do occur from time to time whether it is number counting or anagrams , spelling or proverbs. At least if you contact the setter you can stop " Scratching your head".
Morning all.
Having deliberated on this one for over a week I happened to be in the shop this morning where I originally bought the puzzle. Lo and behold ALL the remaining puzzles for sale had been manually corrected with the last letter changed from S to M. Yes mistakes DO happen!!!!