The letter from Foster Morrison is both provocative and much appreciated. It is a veritable syllabus for an advanced course on everything not as yet resolved by applied mathematicians. Not being one, despite my simplified application of some properties of numbers, it might be best to leave sleeping tigers alone on that score. However, I will venture some responses in the same spirit of enquiry that marks the tone of Morrison's remarks. The points I take up are fairly evident in following the sequence of paragraphs in his letter (if I have missed anything, it is either because the response is implicit in other remarks or there was nothing to add).