L. Shenks Ferry (Smith) interlocking tower circa 1967. This tower survived the electrification and addition of automatic block signals in 1938 and was employed as needed in the event of a wreck or track work in the area. Photo by William R. Fry, Jr. R. LG27, one of 11 watch boxes on the A&amp;S Branch, located just west of the Safe Harbor Viaduct where sharp cliffs and rock cuts posed concerns. These were staffed 24/7 and equipped with the necessary tools, a stove and telephone box for inspectors to conduct their work while staying in constant contact with block operators and dispatchers. Collection of the Southern Lancaster County Historical Society