When did the B&M and MEC discontinue use of telegraphy? I grew up in central Mass. near the Fitchburg main, and recall the old four-tiered poles standing into the '70s, but I don't know whether they were still being used. IIRC, most of them were taken down shortly after the Guilford purchase and replaced with new single-tiered poles that I assume were used for electrical/signaling purposes. (The same thing was done on the MEC.) The wires on these later poles appear now to be dormant, except between proximate signals cabinets.