Notes on the Robert ap Huw Manuscript DANIEL HUWS These notes fall into three sections. The first offers some elaboration on what has been written by Stephen Rees and Sally Harper about the eighteenth-century additions in their account of the Robert ap Huw manuscript; the second offers a collation of the manuscript; the third summarizes our knowledge of other manuscripts of pre-1700 Welsh secular music which survived into the age of the antiquaries. 1 Eighteenth-century additions Discussion of these additions was not given a good start by Henry Lewis's assumption in his introduction to the 1936 facsimile edition that they were all made by Lewis Morris.2 Henry Lewis, on pp. ix-x, lists the main additions, numbering them 1-15. For present purposes of identifi- cation we shall avoid possible confusion by following this numbering. 1-3: Two short texts and the drawing of the Mostyn silver harp. All three are in the hand of Richard Morris. Richard Morris never visited either Mostyn or Gloddaith. All three items are copied second-hand if not at a further remove from their sources, not before 1748 and probably after 1766 (see below). Texts 1 and 2 occur, in an unknown hand, among papers of Lewis Morris in AB MS 21300D, pp. 25-8. These copies were probably Richard Morris's immediate source. 4: The title-page, in the hand of Lewis Morris, probably written about the time of his having the manuscript bound in 1742. 5: For a long time I took the hand that wrote the contents list on pp. 1-2, the pagination in red,3 and also the invaluable note on p. 22, a hand which for the purpose of discussion we can call 'X', to be that of some precursor of Lewis Morris. No one familiar only with Lewis Morris's distinctive mature hand, represented on these two pages by the later additions,4 could confidently assert that X is his hand. But slowly I was