See 18 June 1844 entry in JS History, vol. F-1, pp. 116–121.
TEXT: This plus symbol is keyed to a second plus symbol in the left margin, indicating that the text following the second symbol should be inserted here.
TEXT: This asterisk is keyed to another asterisk six lines below, indicating that the text following the second asterisk should be inserted here.
TEXT: This asterisk is keyed to another asterisk six lines above, indicating that the following text should be inserted above.
Insertion in handwriting of Thomas Bullock.
Cancelation and insertion in handwriting of Thomas Bullock.
Jonathan Grimshaw handwriting ends; Thomas Bullock begins.