I think you will find Benjamin Davies in the 1901 census - rural Lampeter covers a very large area, but there is a family which is very probably the one you are seeking - "Frondeg on Cwmiago" is the description on the census form. But Frondeg IS on the older maps, nearer Cribyn than Cwmiago.
Oldmaps.co.uk coordinates are 252550 and 249520
1901 census Piece: 5145 / Folio: 47 (Page: 10)
Present road number is B4337.