TowGuy, I just found a LOT of stuff on the Cape Breton Highlanders on the net, including a booklet. Here is a pic to start. How much have you found so far online? I have found old pics, new pics, videos, old articles, a book and the location of all the cemeteries in Europe where their members are buried, etc. etc. Here is some quick information on their mottos, marches and tartans throughout their history (copied from the web):

Regimental Tartan and March Past
The 94th Victoria Regiment (Argyle Highlanders)
1871 to 1920
Tartan: Campell (Duke of Argyll)
(Black Watch)
Motto: Dileas Do'n Bheatich
(True to the Flag)
March Pass: Campells are coming
The 85th and 185th C.E.F. Great War
1915 to 1920
Tartan: Sutherland (Argyll and Sutherland Highlanders)
(Black Watch)
Motto: Siol Na fear Fearail
(Breed Of Manly Men)
March Pass: 85th --- The Highland Laddie
185th -- All the Blue Bonnets are Over the Border
The Cape Breton Highlanders
1920 to1954
Tartan: Sutherland (Argyll and Sutherland Highlanders)
(Black Watch)
Motto: Siol Na Fear Fearail
(Breed of Manly Men)
March Pass: The Highland Laddie
2nd Bn Nova Scotia Highlanders (Cape Breton)
1954 to Present
Tartan: MacDonald, Clan Donald
Motto: Siol Na Fear Fearail
(Breed of Manly Men)
March Pass: The Highland Laddi
THE INFANTRYMAN
" Let us be clear about three facts. First of all, all battles and all wars are won in the end by the infantryman. Secondly, the infantryman always bears the brunt. His casualties are heavier, he suffers greater extremes of discomfort and fatigue than the other arms. Thirdly, the art of the infantryman is less stereotyped and far harder to acquire than that of any other arm."
Field Marshall Lord Wavell

There is a lot more, I will just post another pic for now.

Click image for larger version.  Name: cape breton highlanders.jpg  Views: 19  Size: 109.7 KB  ID: 12944