I have the constitutions of the Cymmrodorion, and am highly pleased with their scheme. I will contribute something in money, tho I have children, towards promoting it, and with pleasure do all in my power as a corresponding member. Gronwy’s ode is an excellent thing; but what he calls _Cadwyn fyr_ is erroneous, because it is in reality _Cadwyn gyflawn_. I do not blame him for this, because Dr. IDR’s imperfect rule and false examples led him into this error. Some, perhaps, may be offended because the ode part is not _unirythm_, which it is supposed to be by the very name; but I do not like the poem the worse for that. I shewed you the true _Cadwyn fyr_ in W. Ll’s grammar, and likewise in S. F’s.—I have since had the same in a book of Gr. Hirs, who was the chief professor of the age, and a perfect master of the faculty, though, in my opinion he had no extraordinary genius. His tutor was Tudur Aled, who was nephew and pupil to D. Edm., yr hwn a ddychymygawdd y mesur Cadwyn fyr. It were false concord to call it _Cadwyn fyr_. D. ap Edmund’s tutor was Mered. ap Rhys, of Rhiwabon, witness G. Gl.—Y mae genyf bedwar pedwar ar hugain cerdd Dant Crwth.—Ar 24 cerdd dant telyn, a hanes yr eisteddfod gyntaf yn Nghaerwys.—To-day I saw an account of Merddin a’ Mhorfryn’s being buried in Ynys Enlli. Here patience and paper end together. Remember me to my old neighbours. Yours affectionately, WM. WYNN. _Ll. Gynhafal_, _Dec._ 13, 1755. * * * * * Dr. Percy, late Bishop Dromore, to the Rev. Evan Evans. SIR,