Today I attended a function of Boston area railroad retirees, many B & M and some from Amtrak via Penn Central & Conrail, MBCR and even Keolis. I posed the question to a retired B & M trainmaster about my age (71) and he told me how the yard jobs were set up. There was also a retired conductor in on the conversation too. All the Boston Yard jobs were assigned to various divisions. The examples they gave were Yard 8, New Hampshire Div., Yard 7 Fitchburg Div., Yard 21 Portland Div., Wharf jobs to Mystic Wharf, 3 tricks, one NH, one Portland and the night (3rd trick) Fitch. Portland Division also had two parts, East and West. On the Yard 21 and Wharf, they couldn't tell me if it was Portland East or West.