Dear Meaty,
Thanks for your message. It was very kind of you to have passed on the Census information, but I had already looked at them. If you manage to get hold of a Carmarthenshire Sheet XIV S.W. (South West) Second Edition 1907 - (failing all else you can get a copy for a small fee at the National Library at Aberystwyth) you will see that the houses are situated in Saron village which is in the Llangeler Parish (but I'm sure you already know this), just for info there is a Soar Uchaf and a Soar Isaf which are more or less opposite to each other, and Milestone cottage is just a little bit South from them.
Anyway, I have tried by looking at the old 1907 map and the modern OS 185 Explorer Map Newcastle Emlyn (with, I hasten to add, a lot of help from my husband) to give you some idea of where they were / are:
Soar Uchaf - Grid Ref 2 376 0 /2 377 0 - on West side of A484 at SE edge of Saron opposite public footpath that runs NE to Penrallt-ddu;
Milestone Cottage (now we believe is a new bungalow and re-named): Grid Ref: 2 376 5 / 2 376 0 on East side of A484 at SE edge of Saron (opposite a former? mile-stone don't know whether this is still there or not - if it is, it should read Newcastle Emlyn 6m and Carmarthen 13m.
According to the book "Hanes Plwyfi Llangeler a Phenboyr" gan Daniel E Jones - which you may or may not have seen (it was a winning essay in the Drefach Felindre Eisteddfod in 1897 and was published as a book in 1899 - anyway in there, on page 322 it mentions the following: When David Jenkins was a child he was taught to measure with a slide-rule by Daniel Jones, Mason, Soar Uchaf who was an excellent measurer...... Also, at the back of the book as one of the many subscribers, there is a Mr Eben Jones, Milestone, Llangeler.
Thank you for your kind offer of help which I may well take up some-time. We live in Llandrindod Wells but I have brothers living in Lampeter and Carmarthen and other relatives living in and around Pentrecwrt, Drefach Felindre etc. I have found gravestones for some of my relatives from Llangeler at Penboyr Church, and Capel Mair, and I found quite a lot at Saron Chapel. This is a large pale green building and it's fairly near the Llwyndafydd Inn / Pub.
Anyway, that's it for now - hope this helps and happy hunting .......
Regards, Alltcafan