Sue, Goodwin attaches Killip as the second husband of Jane Kermode, with child Alfred, whereas these should have been attached to Jane's mother, Isabella Joughin. Jane Kermode’s marriage to Peter Chandler might be correct. We now know that Alfred Killip did not die in infancy, so the d on its own in a Goodwin tree must mean simply that the person has died. Constance Radcliffe always used the solitary d to indicate a death, or presumed death, in infancy.
The rest of your message all looks very probable.
Donna, thank you for coming in here. Your additional material has thrown up a couple of interesting points.
Isabella was buried a Killip, but by the time the MI came to be inscribed she had been reclaimed as a Kermode after such a brief second marriage.
Thomas Killip would have been born in 1849. His mother would have been James Killip’s first wife. We might find him in the census of 1851 or 1861 with his father James. Mary Ann would have been James’s third wife.