The Sportsman's Hornpipe(as played for example by Boden and Spiers) is not in Irwin's notebooks. It comes from the Lancashire fiddler Joseph kershaw.
    Alan Bell was confused about Irwin's books: it was Gilchrist's copies of some of his tunes which were given to the EFDSS at Cecil Sharp House. If you use the clickie in the first post on this thread, you will get to an account of these notebooks.