[DavidS]

A lazy day today, so I thought I'd cobble this together if it helps you arrange your stamps, Expat.

Everything Bill A says is correct, I just added dates & dug up the corresponding CEF battalions these regiments would have contributed to.

The order will vary depending on how you want to organize your stamps. If you are looking at strict historic seniority dating back to the pre-WWI militia era, like Bill says, the order will be as per the numbering of the regiments, with the French Canadians and the Nfld. Regiment coming last.

The first year date left of the regiment name is when they can trace their lineage to. The year in square brackets is when they adopted the name they would have been known by according to your stamps (although the stamps aren't quite correct in some cases). Precedence does not precede Confederation, so even though there are militia units tracing lineages to 1866, they only 'officially' go back to 1900 in precedence.

If you are looking to arrange your stamps by when the regiments appeared in the CEF order of things, I'd go by the date the first battalion they contributed to or raised was authorized. The 41st & 45th would come after the 48th, 49th & 57th, since their CEF battalions were authorized Dec. 1915, vs. Aug. 1914 for the 'junior' regiments' battalions.

A couple of oddities. Like Bill said, the 91st Regiment, Manitoba Light Infantry isn't right. This should be the 91st Regiment, Canadian Highlanders (from Ontario). The Manitoba Light Infantry were disbanded long before WWI. The other is the 19th Lincoln, which shows it's previous incarnation's 19th St. Catherines badge.

---

Cavalry

1883 [1893]: Royal Canadian Dragoons
— sailed 1914 as part of 1st CEF contingent

1901 [1907]: 9th Mississauga Horse
— 2nd Bn. CEF (Aug. 1914), then 4th & 7th Mounted Rifles (March 1915)

1909: 25th Brant Dragoons
— 4th Mounted Rifles (March 1915); poss. 125th Bn. CEF (Dec. 1915)

1911 [1912]: 31st British Columbia Horse
— prob. 2nd Mounted Rifles (March 1915)


Corps

1871 [1893]: Royal Canadian Artillery

1903 [1907]: Canadian Ordnance Corps


Infantry

1884 [1906]: 5th Regiment Royal Highlanders of Canada
— 13th (Aug. 1914), 42nd & 73rd Bn's CEF

1863 [1912]: 19th Lincoln Regiment
(was the “19th St. Catherines Regiment” from 1900-1912, and your stamp shows that badge)
— 81st (Aug. 1915) & 176th Bn's CEF

1866 [1900]: 29th Waterloo Regiment (re-named “29th Regiment (Highland Light Infantry)” in 1915)
— 1st (Aug. 1914), 34th & 111th Bn's CEF

1866 [1900]: 34th Ontario Regiment
— 2nd (Aug. 1914), 116th & 182nd Bn's CEF

1866 [1900]: 41st Regiment “Brockville Rifles”
— 156th Bn. CEF (Dec. 1915)

1866 [1900]: 45th Victoria Regiment
— 109th (Dec. 1915) & 252nd Bn's CEF

1891 [1900]: 48th Regiment “Highlanders” (re-named “48th Highlanders of Canada” in 1930)
— 15th (Aug. 1914), 92nd & 134th Bn's CEF

1866 [1900]: 49th Regiment (Hastings Rifles)
— 2nd (Aug. 1914), 39th, 80th & 254th Bn's CEF

1867 [1900]: 57th Regiment “Peterborough Rangers”
— 2nd (Aug. 1914), 93rd & 247th Bn's CEF

1903 [1904]: 91st Regiment, Canadian Highlanders. 91st Bn. Manitoba Light Infantry was disbanded in 1898. Remnants became 12th Manitoba Dragoons in 1893, so if I read this correctly, this is not the same regiment and the 'Delandres' with the Manitoba Light Infantry badge on it instead of the Canadian Highlanders badge would be an error.
— volunteers to 16th Bn. CEF (Nov. 1914)
— 19th (March 1915) & 173rd (July 1916) Bn's CEF

CEF (no previous militia regiment):

1915 (July): 41st Bn. CEF / French Canadians

BEF:

1915 (May): 1st Newfoundland Regiment