I came across this in Canoeing With the Cree and had to share:
“Ahead of us we could see among the bobbing breakers a canoe with two men. Bucking the waves directly we caught them. They used double-blade paddles and we tried them for a short while, but gave up in disgust. On a smooth lake I suppose they are all right, but it rough weather they are unwieldly and in a rapid, of course, they would mean suicide”.
If Sevareid canoed only with the Cree, I doubt he saw that tribe use double blade paddles. However, I would defer to Murat (and my misplaced Adney & Chapelle) on that point.
More importantly, let's focus on what Severeid encountered, which was apparently
two men in the
same canoe
both using double blade paddles.
I would submit that even in the modern era's tragic, kayak-centric milieu of the Domination of the Double Blade, it is very unusual to see a tandem canoe propelled by two double blade paddlers. And this is still so, I venture to say, both for traditional CanAm open tandem canoes while touring and tripping and for decked tandem canoes when running whitewater. Severeid was likely of the very reasonable opinion that two double blades in a single open hull could become klutzy and uncoordinated in heavy wind, waves and technical whitewater.
Tandem kayaks and tandem "pack canoes", which are sit-on-bottom crafts designed for double blades, will of course feature two double blading paddlers.
Similarly, modern era solo paddlers in open canoes quite commonly resort to double blades, which can be due to to lack of single blade skill, lack of single blade experience in wind, waves or rapids, lack of single blade confidence in certain paddling conditions--or, to the contrary, simply because of an aesthetic or functional preference for a double blade.
However, in my experience, most open canoeists who occasionally or even usually use a double blade when solo will, like Eric Severeid and his partner, even today revert to single blades when paddling tandem in a traditional open canoe. So, I don't find his opinion--under the circumstances he encountered--to be controversial by the paddling standards of any era thus far.