One of Don's proudest achievements occurred in 1965 when his design was personally chosen by Prime Minister Lester B. Pearson for the new Canadian Flag. Don's design, featured a realistic representation of a red maple leaf, flanked by two solid blue bands representing 'from sea to sea'. Pearson changed the blue bands to red, saying to Don, 'this is a Liberal flag'. Don's design, until recently, was credited to a design committee. However, it is now recognized as his work, by leading International and Canadian news and design publications.
But my memory recalled a different story.
My understanding was that it was designed "by committee" but that the real work was done by George F.G. Stanley, with graphic touchup by an inhouse graphic designer, Jacques Saint-Cyr. Reading the letter above certainly makes it sound likely.
No discredit to Don Watt, but the obituary sounds like wishful thinking.