See 15 Dec. 1843 entry in JS History, vol. E-1, p. 1804.

See 16 Dec. 1843 entry in JS History, vol. E-1, pp. 1804–1805.

TEXT: This plus symbol, notation, and line drawn to a paragraph nine lines below indicate that the paragraph should be inserted here.

TEXT: This plus symbol and notation indicate that the following text should be inserted nine lines above, where there is a corresponding plus symbol.

See 17 Dec. 1843 entry in JS History, vol. E-1, p. 1805.