Sources

Citing Sources:
It is important to me that sources be cited whenever possible for two reasons:

1. It allows readers to independently verify any portrayal of the situation I might give.
2. It gives credit to the work of others, for which I am grateful.

That said, this is a working blog.  Not everything is going to be given a perfect citation, despite best intentions.  If you see something I should have cited, say something and I will work to change it.  Also, if you choose to use something here - especially if you quote verbatim what I worked to put together - I expect some sort of citation indicating where you got the material for the reasons above.

Web Resources:
Below is a list of resources I frequently use for postal history research.  I will work on this list incrementally over time.  Last updated: May 2020

Richard Frajola's PhilaMercury Site
United States Philatelic Classics Society
US Postmaster General Reports on PhilaMercury site gathered by Baird, Mackie and Ludeman
Index of Congressional Postal Acts 1789-1845 (pdf on PhilaMercury)
Post Office Acts and Other Resources on PhilaMercury site
US Postal Conventions with Other Countries prior to the General Postal Union on USPCS site
US Postal Bulletins and PL&Rs from 1880-2013
Internet Postal History Resources links suggested by participants on PhilaMercury
David Rumsey Map Collection
Les Tarifs Postaux Francais: Entre 1848 et 1916 by Jean-Louis Bourgouin

Great Britain UPU Surface Letter Rates 1875 - 1975 by the Great Britain Philatelic Society
The Arthur White Postal History Archive hosted by Siegel Auctions
IEG Maps created by the Leibniz Insitute for European History
Newberry Digital Collections - Independent Research Library in Chicago
Perry-Castaneda Library Map Collection - University of Texas
Marques Postales - by Guy Maggay
Worldwide Railway Postmark References - Railway Philatelic Group
European Transportation Maps of the 19th Century - University of Chicago Library
Datafiles of Historical Prices and Wages - International Institute of Social History
Records of the US Post Office Department - National Archives list

Sources of Historical Information on Post Offices, Postal Employees, Mail Routes & Mail Contracts - Publication 119 of the US Postal Service
Postal Route Maps List - United States National Archive
Timeline of Philatelic Literature - draft by Don Heller
Netherlands Postal History from 1921 -
Brazil's Postal Conventions with Other Countries - Brazilian Philatelic Society