Mode of Tying and Claying Graft
Grafting is placing two cut surfaces of one or different plants under conditions which cause them to grow together. Picture A shows the mode of tying the graft adopted with many fruit trees. Picture B shows the work completed by the application of clay.
Nicholson, George The Illustrated Dictionary of Gardening, Div. VI (London, England: L. Upcott Gill, 1884)