Letter from William House or Horne concerning a memorandum of 1805 written by Robert Wilson, which he has lent ‘to a public institution’. The letter states that the memorandum referred to the trail of a steam engine at Wylham and ‘whether it was a Trevithick engine Mr. Wilson refers to or not I do not know’. With pencil notes possibly by Francis Trevithick on the reverse. (1 sheet/4pp.)