Cape of Good Hope Triangular Stamps
Partial Reading List Taken from Article
OK, Al (angore
), here is a list created from the references and suggested reading sources at the end of my article. It is not comprehensive, but it represents all of the sources that I could find related specifically to identifying Cape Triangles. I did receive some help from the APRL with a few of these, but 80-90% I found through my own research, mainly online.
References & Credits
 Allis, Gilbert J. The Postage Stamps of the Cape of Good Hope. Stanley Gibbons Ltd., London, 1930.
 Stevenson, D. Alan. The Triangular Stamps of Cape of Good Hope. H.R. Harmer Ltd., London, 1950.
 Bertolaja, Antonio. My Romance with the Cape. David Feldman SA, 2002.
 Rosenthal, Eric & Blum, Eliezer. The Cape of Good Hope Triangular Stamp and its Story. A.A. Balkema, Cape Town & Amsterdam, 1957.
 Sismondo, Sergio. “Cape of Good Hope: postal reform and its triangle stamps of 1853”. Linn’s Stamp News, Unveiling Classic Stamps. Amos Media Inc., Sidney, Ohio, U.S.A., 15-Jul-2019.
 Jaffe, Peter. Cancelled by Perkins Bacon. Bendon (James), Cyprus, 1999.
 Allan, Greg. Cape of Good Hope 1853-1864 Triangle Stamps: How to tell if yours is real! A 5-minute guide. Peninsula Publishers, Simon’s Town, South Africa, 2009.
 Munck, Morten. Forged Stamps of Cape of Good Hope. Stamp Forgeries website accessed on 02-Jul-2022. stampforgeries.com/forged-stamps-of-cape-of-good-hope/
 Marleau, Ron. Cape of Good Hope, Part 1. Classic Stamp Forgeries blog website, posted on 25-Apr-2021; accessed on 02-Jul-2022. stampforgeries.blogspot.com/2021/04/cape-of-good-hope.html
 Cape of Good Hope. Stamp Bears Worldwide Forum website. Last updated on 05-May-2021; accessed on 03-Jul-2022. stampbears.net/thread/2345/cape-good-hope
 Cape of Good Hope: Stamps. The Stamp Forum (TSF) website. Last updated on 30-Jun-2022; accessed on 03-Jul-2022. thestampforum.boards.net/thread/1542/cape-good-hope-stamps?page=1
 Cape of Good Hope Triangle Identification Thread. Stampboards: Postage Stamp Chat Board & Stamp Forum website. Last updated on 25-May-2022; accessed on 03-Jul-2022. stampboards.com/viewtopic.php?f=10&t=10569
 Cape of Good Hope - Triangular Stamp Issues (1863-1864). Stampboards: Postage Stamp Chat Board & Stamp Forum website. Last updated on 06-Apr-2018; accessed on 03-Jul-2022. www.stampboards.com/viewtopic.php?t=33487
 Ozdoba, Christoph. Kap der Guten Hoffnung: Unterschiede der Drucke von Perkins Bacon und De La Rue [Cape of Good Hope: Differences between the Perkins Bacon and De La Rue Prints]. Klassische Philatelie und Postgeschichte [Classic Philately and Postal History] website last updated on 26-Apr-2008; accessed on 02-Jul-2022. www.klassische-philatelie.ch/cogh/cogh_dlr.html
 How to Distinguish Between the Perkins Bacon and the De La Rue Issues. Found under Markings of the Ancillary Services: De La Rue Printing. Cape of Good Hope Stamps and Postal History website, posted on 18-Mar-2018; accessed on 03-Jul-2022. capestamps.com/markings-of-the-ancillary-services/
 Debney, Richard (posting name “capetriangle”). Cape of Good Hope Triangle Identification Thread. Stampboards: Postage Stamp Chat Board & Stamp Forum website. Post made on 16-Jan-2014 referring to Navy blue (DLR prints) and Prussian blue (PB prints); accessed on 02-Sep-2022. www.stampboards.com/viewtopic.php?t=10569&start=100
 Luff, John. The Postage Stamps of the United States. The Scott Stamp & Coin Co., Ltd., New York, 1902. Reference on sulfuretting on p. 78.
 Weiss, Bill. How to Remove Oxidation (Sulphurization) from Stamps. Stamp Smarter Philatelic Learning Center, accessed on 31-Aug-2022. stampsmarter.org/learning/HowToRemoveOxidation.html
 Jackson, Jim. Cape of Good Hope Triangulars: 1853-1864 Four Pence Blues Part A. Posted on 30-Jun-2022; accessed on 03-Jul-2022. bigblue1840-1940.blogspot.com/2022/06/cape-of-good-hope-triangulars-1853-1864.html
 Jefferies, Hugh (Editor). Stanley Gibbons Stamp Catalogue: Commonwealth & British Empire Stamps 1840-1970, 124th Edition 2022. Stanley Gibbons Ltd., London and Ringwood, 2021.
 Bigalke, Jay (Editor-in-Chief). Scott 2021 Classic Specialized Catalogue, 27th Edition, Stamps and Covers of the World including U.S. 1840-1940 (British Commonwealth to 1952). Amos Media Inc., Sidney, Ohio, U.S.A., Nov-2020.
 Hip Stamp: Cape of Good Hope. Edited on 10-Apr-2022; accessed on 25-May-2022. www.hipstamp.com/search?keywords=cape%20of%20good%20hope&parent_id
 James, George. Stanley Gibbons Ltd., London. Personal correspondence dated 27-Jun-2022.
 Debney, Richard. Cape of Good Hope, 1853-1864 (6-frame exhibit). Stockholmia International Stamp Exhibition, Stockholm, 2019; accessed on 01-Sep-2022. www.stampboards.com/viewtopic.php?t=92215
 Debney, Richard. Personal correspondence dated 05-Sep-2022.
 Postage Stamps of the Cape of Good Hope: The Collection formed by Sir Maxwell Joseph including Postal History from 1652 and 1900 Siege of Mafeking. Sotheby’s, London, 1982.Additional Reading
Bührmann, Emil. “Collecting Cape of Good Hope.” Part 2: The Triangular Stamps (1853-1863). The South African Philatelist 91, no. 2 (April 2015): pp. 42-44.
Goldblatt, Robert. Postmarks of the Cape of Good Hope: The Postal History and Markings of the Cape of Good Hope and Griqualand West 1792-1901. Reijger Publishers Ltd., Cape Town, 1984.
Janssen, Volker. Cape of Good Hope, Part 1: The Stamps 1853-1910. Philately Collections of Stamps, Volume 1. Peninsula Publishers, Simon’s Town, South Africa, 2018.
Kalkhoven, Vincent. “CGH: Watermarks of the Triangular issues”. Cape & Natal Philatelic Journal, Vol. 15, No. 2 (58), 2011.
Mordant, David. The Barred Oval Numeral Canceller of the Cape of Good Hope from 1863-1963, Second Edition. Philatelic Society for Greater Southern Africa, 2020.
Negus, Ron. “Hope Springs Eternal.” Stamp Magazine 74, no. 3 (March 2008): pp. 48-51.
Ozdoba, Christoph. Cape of Good Hope. Classic Philately and Postal History website last updated on 30-Jul-2006; accessed on 02-Jul-2022. www.klassische-philatelie.ch/cogh/cogh_intro.htmlOther Online Resources (Alphabetical)
BPA Expertising Ltd. www.bpaexpertising.com/
Jackson, Jim. Cape of Good Hope Triangulars: 1853-1864 Four Pence Blues Part B. Posted on 17-Jul-2022; accessed on 18-Jul-2022. bigblue1840-1940.blogspot.com/2022/07/cape-of-good-hope-triangulars-1853-1864.html
Janssen Stamps, located in South Africa, is a source for many COGH-related philatelic publications.www.janssenstamps.com/site/philatelic_books.shtml
The Royal Philatelic Society London (RPSL). rpsl.limited/Experts/Certificate-Application