See 7 Oct. 1838 entry in JS History, vol. B-1, p. 834.
TEXT: This pound symbol corresponds to another pound symbol in the left margin of this page, indicating that the text in the margin should be inserted here.
TEXT: This pound symbol in the margin of the page corresponds to another pound symbol at the top right of the page, indicating that the text in the margin should be inserted where the first symbol appears.
See 9 Oct. 1838 entry in JS History, vol. B-1, p. 834.
See 10 Oct. 1838 entry in JS History, vol. B-1, pp. 834–836.