Canadian National Railway Mail Car 
Study Group newsletters
Inside the Mail Car 
Railway Post Office (RPO) and Transportation Post Office (TPO) postmarks attract numerous
philatelists for reasons of postal history, interest in railway history, waterway history,
and their pure collectibility.
As with other specializations, RPOs almost demand the availability of good reference
information because making sense of the many postmarks, hammers, routes, and other variations is benefited
greatly by the experiences of others.
For meetings of the RPO Study Group, please click HERE.
Collectors of Canadian RPOs have some wonderful reference publications, catalogues, and websites. A
few of these are:
A History of Canadian R.P.O.s, 1853-1967 by L. F. Gillam. Published by the American
Philatelic Society in 1979.
This book is organized by railway companies. It includes a short history of the development of each
railway system, a chronological history of the RPOs used on the lines of the systems, pertinent
dates and maps. Subsequent studies by many collectors have produced updates to this information so
the reader should be careful to check information in this book where it is speculative.
Nevertheless, the speculations offer real opportunities for
new RPO collectors to embark on their own research - which is a bonus!
Catalogue of Canadian Railway Cancellations and Related Railway Postmarks
including Selected Waterway Postmarks, second edition, edited by Ross Gray.
Published by BNAPS in 2015.
This catalogue is the reference for listings of postmarks, correlations
with train numbers, dates, and rarity factors. It provides a wealth of information about
RPOs and their history. For details, go to
BNAPS RPO Study Group Newsletters.
Members of the Study Group benefit from regular newsletters that
provide listings updates and reports from studies conducted by members. Some
hard-working members of the Group, led by award-winning editor Ross Gray, regularly produce
this interesting newsletter - worth much more than the annual dues!
Proof Strikes of Canada; Vol. XVI, Transportation Proof Strikes of Canada, Part 1
edited by J. Paul Hughes. Published by Robert A. Lee in 1992.
Proof Strikes of Canada; Vol. XVII, Transportation Part 2 and Squared Circle
Proof Strikes of Canada edited by J. Paul Hughes. Published by Robert A. Lee in 1992.
These two books are among several proof books published by Lee. They provide detailed images of
the original strikes of RPO postmarks. No additional information is included but these books
are very useful for clarifying poor strikes on stamps and covers.
Travelling Post Office Postmarks of Newfoundland and Labrador by Brian Stalker.
Published by BNAPS in 2005.
Because most official records for the Newfoundland Post Office were destroyed shortly
after Confederation in 1949, it is not possible to create a definitive work, but this
book draws together numerous pieces of a highly fragmented jigsaw into a nearly complete
picture. For more information, go to
Links to useful RPO websites
Here you will find the history of Canadian railways, train station locations, routes, maps,
Recollections of RPO service
Stories from people who were part of the RPO service.
Some reference material for other specialties, such as squared circles, is useful (three
Canadian RPO postmarks were designed with the squared circle format). RPO collectors also find great
value in older railway maps and railway timetables. One of the intriguing aspects of RPO
collecting is the challenge of tracing actual routes taken by covers showing many postmarks.
Here are definitions of some commonly used RPO technical terms.
 Photos taken by Robert K. Lane at the Edmonton Railway Museum
Study Group newsletters
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