To add to what Rick said:
Gordon Chappell, who both volunteered and worked as a paid employee for Bob, already a trained historian, went on with what he learned from Bob Richardson to become a railroad historian as well, and to edit as well as write for some of the Colorado Railroad Museum's Colorado Rail Annuals. (His latest railroad piece is a history of the Carson & Colorado in the Proceedings of the 7th Death Valley History Conference, just off the press). Chappell later worked for the State Historical Society of Colorado, the U.S. Army Military History Institute, and from 1974 to the present, as Regional Historian for the U.S. National Park Service, for which he wrote a history of the Union Pacific's Kelso Depot in Mojave National Preserve.
Kent Powell, who both volunteered and worked for Bob Richardson, sought a career in law enforcement, but he must have absorbed some of Bob's love of postal history and philately, because he went on to a career as a U.S. Postal Inspector, ferreting out crime that involved the U.S. Mails.
Working for Bob Richardson was an education in itself, and observing him, one learned how to treat others, and how to be ethical and honest in conducting one's own life. Bob was, among other things, a good businessman and set an excellent example, but NOT out to charge "all the traffic would bear," rather to give the customer a good, honest product for his money while making the Museum a reasonable profit.