Canoe by a boatbuilder?
Some thoughts after looking at Neil's photos:
The boat was probably built in the UK in the first quarter of the 20th century by a boatbuilder (as distinct from a canoe builder) who had in front of him, or was familiar with, “Canadian” canoes.
• Several of the features of the boat, in particular the lack of an inwale and the wide, tapered outwale, are typical of canoes from the Peterborough, Ontario area, and would have been seen on many of the canoes exported from here around the world. The centre thwart is also in the style of Peterborough-area canoes, with the rebated end pieces to attach it to the hull, but is very heavy and clumsy in its execution relative to what would be seen on a canoe. The same is true of the keel and longitudinal stringers.
• The way these details are rendered, though, suggests that someone not familiar with that style of construction was copying what they saw in front of them.
• The same is true of the boat’s profile—a classic canoe bow, with a strongly re-curving shape, married up to a rowing skiff stern. This combination is not a Canadian feature.
• In the same way, there are a number of boatbuilder-style details, such as the heavy transverse floor timbers and the sawn frame near the stern, not often seen on canoes, which suggest a local origin with a canoe influence.
• The striped floorboards have a very “upper Thames” look to them. A builder like Peter Freebody in Hurley [see:
http://www.peterfreebody.com/] who is familiar with that type of pleasure craft might have some ideas.
• As it appears to have no means of lateral plane, the boat is only notionally a sailing canoe, and would have had, at best, a very small rig. The mast partner and thwart may also be after-market additions not present when the boat was built. The boat is missing an upper gudgeon, and the rudder may have been married to this canoe from another boat, since it does not match well in terms of scantling, construction, finish or hardware.
• As regards restoration, the boat appears from the photo to have butt-joined thin planks, so waterproofing the seams would be an issue. There are also a number of splits in the planking. There is also at least one very unsympathetic modern repair near the keel that should be removed and re-done. There is major rot in the after deck. These factors might make it a good candidate for a cosmetic, i.e., non-working, restoration. A restoration to operating condition would necessitate some pretty drastic intervention and replacement of existing material.
Sort of a Platypus, I'd say.