Allen H. Tweddle (1949-) is a retired railroad conductor and avid collector of railroadiana. Railroadiana are artifacts related to current or former railways. This small collection consists of photographs, prints, and note cards related to railroad locomotives. There are photographs of train stations, train cars and engines and one stereoview showing an elevated railway street scene of New York City. There is an album containing many different Amtrak trains, several blotters from the Association of American Railroads, and a few series of note cards. Notably there is a large collection of railroad locomotive trading cards from the Topps Chewing Gum Company series called "Rails and Sails" published in 1954.

A collection amassed by a retired conductor successively employed by the Pennsylvania Railroad, Penn Central, Conrail and Amtrak. It consists partly of company publications and documents collected on the job, and partly of advertisements, timetables, brochures, maps and other railroadiana from many different companies bought from dealers and other collectors. It is particularly useful for the Amtrak manuals relating to things like consumer satisfaction, employee health and safety and equipment maintenance.

From 1925 to 1958, the Pennsylvania Railroad Company issued a series of advertising calendars, each measuring over two feet square. Of the thirty-three calendars published, twenty-eight were illustrated by Grif Teller (1899-1993). This small collection consists of six posters featuring the paintings from the 1949, 1950, 1951, 1953, 1954, and 1955 Pennsylvania Railroad advertising calendars. The title of the painting and the words "Pennsylvania Railroad" appear in the border beneath each image.

The event known as Great Train Wreck of 1856, occurred on July 17, when two trains were traveling on the same track towards one another and collided at Camp Hill, just below Fort Washington, Pennsylvania. This item is a hand colored print of the railroad accident aftermath.