An index by Ioan Pedr to William Salesbury's 'Llysieulyfr Meddyginiaethol' and to William Salesbury and Henry Perry: Eglvryn Phraethineb ... (London, 1595).

A herbal entitled 'Llys-lyfran 1805', compiled by Richd. Roberts, Melin y Coed, for his son David Roberts 'when he was Aprentice Doctor at the Dispensary or Frirmary [sic] Denbigh'. The author in most instances includes the Welsh equivalent forms of plant names (although in his introductory letter he deplores the lack of standard forms - 'am nad oedd un Llyfr fel Ystandart iw gael am yr Enwau Cymraeg'), and he occasionally records the places in North Wales where the plants have been observed (e.g ., by the sheep fold above Llandudno, Gwaen Tyn Twll, Y Tybrith isa Llanrwst, 'Castell Dymbych', 'tu hwnt i lyn Chwythlyn', 'Abby Conway', Rhyddlan, Llandrillo, 'ty yma i sarn Bettws', etc.). There are references in the text to 'D.P.', i.e., David Pierce, Esqre., Vron, near Llanrwst, ‘'one of the First Botanists in Wales', and among the printed sources quoted by the author are the works of N[icholas] Culpepper [sic], [William] Withering, and T[homas] Wheeler. There are some additions and annotations by David Roberts to the year 1812, and later interpolations include the names of David Owen, nailer, Llanrwst, and of Mary Owen, 1838. The volume contains an 'Index of the Generic names'.

A transcript, 1763, made by Evan Thomas [d. 1781], Cwmchwylfod, near Bala, of a sixteenth century herbal attributed to William Salesbury [1520?-1600?].

Notes compiled by E. Stanton Roberts towards his edition of Llysieulyfr Meddyginiaethol a briodolir i William Salesbury . . . (Liverpool, 1916).