There are photos of early BL2 led trains in various sources such as Nimke's Connecticut River series, the Philip Hastings' book, and the Morning Sun Boston and Maine books. My area of interest is of the railroad operations in and around Woodsville, NH during the late 40s to early 50's era. Most of the photos I've come across show mostly #1552, and occasionally #1553, at the head of various trains during that time. As previously stated, the Bulletin article is a wealth of information of these engines and I would recommend obtaining a copy.
Two of the Woodsville area trains they were running early on was local passenger train #402 between Woodsville and Concord, which returned the same day as #9. This was an all stops 2-car local which hauled a baggage and coach. The BL2 replaced P-Class Pacifics used previously. The other trains they hauled were milk trains #49 (empties) and #50 (loads) to and from Woodsville. These trains up to that time had used K-Class Consolidations. During 1951, the B&M wanted to replace steam on the local freights that ran in and out of Woodsville. The local passenger train was being hauled by the Sacred Cow unit and the milk trains had been discontinued. The BL2s took over on the White River Jct. to Plymouth local(which returned the next day) as well as the two locals that operated between Woodsville and Groveton six days a week.
Duane Goodman