Unpublished manuscript written by James McLennan, documenting the history of the LeHigh University Department of Physics. The dates discussed in this manuscript range from 1706 to approximately 1980, however the bulk of material covers the founding of the University in 1865, the establishment of a dedicated physics department, and the growth of the physics department through the 1920s and 1930s. Contains several color pictures of buildings and scenes of LeHigh University.