From the Post Office Department records, National Archives and Records Administration:
Samuel Morse had excellent penmanship.
International Pneumatic Tube Company Promotional Literature
Most pneumatic tube system maps were removed from the files for "security reasons."
At NARA II in College Park:
The "no bags" rule meant I had to cart this crap around all day.
The Finds at the National Archives by Shannon Mattern, unless otherwise expressly stated, is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
