Gallium, what's the likelihood of that?

Just to make life more interesting my direct line moved to Cardiff. Now that was fun looking for a John and before Ancestry introduced the parent name search.

Are you one of the others that has posted about Llanbadarn churchyard - possibly the steepest ever seen?
Back to the case in hand - I've spotted Daniel in 1871, think the enumerator got his dittoes mixed up
Pier St, Aberystwyth RG10/5561 folio 73 pgs 45 - 46
Thomas Davies head mar 50 draper b. Llangeitho
Mary Ann wife 39 b. Ysbyty Cynfyn
Mary Jane dau 16 b. Aberystwyth
Thomas Lumley son 15 b. Aber
Frederick Albert son 7 b. Aber
John William Stephen son 6 b. Aber
Daniel George son 3 b. Aber
David Charles son 3 b. Aber
Grace Yeates 22 governess b. Liverpool, Lancashire
Lewis Griffiths unm 35 draper's assistant b. Llanfihangel y Creuddyn
Thomas Jones 23 draper's assistant b. Llangeitho
John David Rowlands 20 draper's assistant b. Llanilar
Daniel Thomas 16 draper's apprentice b. Llanilar
Mary Jones 24 cook b. Caernarvonshire, Llanberis
Margaret Davies 24 housemaid b. Llanfihangel y Creuddyn
all pobs in Cardiganshire unless otherwise stated, Aber = Aberystwyth.
Suspect this is the correct Daniel. His pob was dittoed from entry above, but think it should have been Llangeitho.
You'd expect the marriage to be in Aberystwyth if both parties were living there or in one of the home parishes. Well, it doesn't seem to be in Tregaron(covered Llangeitho) or Aberystwyth unless it hasn't been transcribed on FreeBmd. Looks like Elizabeth's family might be the clue.