Salem sheets with Boston and Maine RR Trackage Lawrence Br: Roughly in order, West to East Mainline: Roughly in order, North to South 1890 Maps Lawrence Br 30 31 32 26 33-21-34 20-34 Mainline 16 15 17-14-13-12-11 20-19 22-7 23-6-24-27-28 38 1906 Maps Lawrence Br 55 54 49 50-60 45 41-62 19-20 Mainline 1 3-4-6 5-7-8-9-11-2-12 13 20 21 23-24 44-29 30-48-47-52 31 40 38 37 64 Marblehead Br. 68 1950 Maps Lawrence Br 55 54 49 50-60 45 41-62 19-20 Mainline 1 3-6 5-7-8-9-11-2-12 13 20 21 23-24 44-29 30-48-47 31 40 38 37 64 Marblehead Br. 76 75 68 1957 Maps Lawrence Br 55 54 49 50 45 41-62 19-20 Mainline 1 3-6 5-7-8-9-11-78 13 20 21a-21b ("RR Tunnel" only) 23 44-29 77 37 64 Marblehead Br. 76-81 75 79 68