202x125mm. Single sheet, double sided on Huxley's 31, Pond Street | Hampstead, N. W. 3. headed paper. It reads, in black ink: 'Dear Sir | Thank you for your interesting letter. | I am very glad you found my little | book valuable. | As for commas, I will | certainly think about the matter. | I have, as a general principle | at the back of my mind, that | a comma should be used whenever | a break or slight pause would | be made in speaking, and | whenever the absence of a comma | could or might lead to ambiguity | in reading. You yourself in | your letter write, | to give… a | comma, nearly always, after an | adverb. This seems to me | entirely in line with my very | usual practice! | I am also glad to see that | you use a comma between | the 2nd & 3rd items in a | list, in spite of its being | before an and. The absence | of commas in such situations | often leads to ambiguity. | Meanwhile I should be glad to | receive a copy of your article; | and will certainly think about | your general point. | Yours sincerely | Julian Huxley'. As readers will see, Huxley here responds to criticism from an academic colleague, whose identity is unfortunately not known. Huxley responds calmly, and does not rise to the criticism, noting the recipients interest in his little book , the title of which is not stated. This is a wonderful letter, marred only by some slight handling marks.