I've recently noticed from looking at Historic Aerials that the Conley Terminal had rail access. I have plenty of local history books and NH railroad books and never come across any pictures or articles describing operations there. The freight yards all over Southie were heavily photographed, but I've haven't seen any on the ground pictures. I was looking at the 1955 viewer and I guess that it was established post war and ceased operations by the Penn Central merger. Must have been interesting seeing long strings of box cars traveling on East and West First Streets.
Check out this picture from Tom O' Toole NE RAIL , #426 East First Street South Boston from 1963.
http://photos.nerail.org/showpic/?20100 ... n&BOOL=ALL