I'm looking for the (missing!) 4th line of the 3rd verse in the Welsh-language chanty version, as presented by Stan Hugill in _Shanties From the Seven Seas_. He seems to have accidently omitted it. Anybody got it?

What's there:
3. Mae yn Nefyn gwrw llwyd
(Hob...)
Mae yn ddiod ac yn fwyd
(Can y ...)
Mi yfais inau lond fy mol
(Sian...)
????