Back on track

All calculations done and the sweater is going fine - and now that have stopped coughing long enough to hold the camera steady, you can have a picture to prove it! That's the back folded and the start of the front on the needles. And the orange stuff is some working out that I am doing.

I could not think what I wanted to do in the way of lace until Vivienne returned my copy of Shetland Hap Shawls, and in it there is a picture of a half-hap - that is to say, a triangle with a border around two sides and an edging around the lot. That is what I want to do. This shawl has a single border of Old Shell, which, to make the edge curved rather than cornered, increases the number of woolovers at intervals. But I can't find a recipe for doing that, and I am trying to work out how it is done. Does anybody out there know how to do it? I would be SO grateful if somebody could tell me.

I have just made the happy discovery that if you click on the link to the book, the shawl I am wanting to do is shown on the second from the right, bottom row.