On the MS&LR, he attracted a salary of £500/annum plus bonus payments based on savings made.
He was replaced by Charles Reboul Sacre, late of the Great Northern Railway, but was retained as a consultant.
The locomotives Craig added to MS&LR stock comprised: At least one of the company's ships was also designed by him.
In 1861 Craig was living in north London, employed as a civil consulting engineer and by ten years later was still there but had added iron merchant to his occupations.
He died in St.Jean de Luz Basse Pyrenees, France 24/01/1886, leaving a will and naming one of his spinster daughters as executor.