Autograph Note Signed to "The Secretary of the Delegates, Clarendon Press, Oxford", about revises of his book "Ultrasonic Absorption" (pub. Oxofrd 1967).

One page, chipped, punch-holes, fold marks, text clear and complete. He gives their reference and the title of his forthcoming book, saying "I sent the revises F & G of my book,last Monday, July 10. | If Iam not too late, please make the additional correction, which is shown in red ink on the attached proof sheet, p.67." Clarendon Press round stamp at top of page.