After setting up the headband between two paddle blades, the tump straps are lashed around the blades and extended to the thwart where the remaining ends are used to lash the handles.
Way of the Wilderness, p. 25
Never used this method before, since I find the paddle blades a bit claustrophobic around the head. Plus I tend to bring two paddles with different blade shapes when paddling and so end up with an uneven load on the shoulders. Still, this method means no need to use any other cordage or lashings for the paddles.
This method is apparently not Rutstrum's creation. A descriptive article simply entitled "Carrying a Canoe" by Richard Garwood Lewis appeared in the April 1930 edition of Field and Stream (Vol. 34 No. 12). In one of his photos, you can see the paddles rigged out in a flared manner (providing more headroom than Rutstrum's illustration) with the tumpline straps extending along the shafts to the lashed grips
Tumpline Lashing Method Closeup