I noticed that you discussed Canadian Railroad records recently on "Question of the Day". Can you advise where I may find records for relatives working for the old Boston & Maine Railroad in the 19th century?
The Center for Lowell History has created a database where you can search for these employee records. The range covers 1874-1939 and you can search them at: http://library.uml.edu/clh/BMlistA.htm
For more information about the Boston & Maine Railroad as a descendant you might wish to contact their historical society:
B&MRRHS Membership, P.O. Box 9116, Lowell, MA 01852