(As usual when it comes to Ireland I am being a bit pathetic with pinning the stories to locations. But I hope the locations still exist).
.. Avowedly malignant ceremonies have been performed at two, if not three, places in East Clare. At Carnelly, near Clare Castle, at an unknown period remote even in 1840, "a black cock, without a white feather," was offered to the Devil on the so-called "Druid's Altar," two fallen pillars near an earthen ring beside the avenue, --to avenge the sacrificer on an enemy, but in this case it brought an equivalent misfortune on the sacrificer himself.
The Duchess de Rovigo, an heiress of the last Stamer of Carnelly, used the story, combined with irrelevant family legends and pseudo-archaeology, in a poem dated 1839, but I obtained it, as given above, from a more reliable source, her mother, in 1875 and 1882, as well as from my brothers and sisters, who heard it in "the forties".
When I was at the dolmen near the house at Maryfort in 1869, an old servant, Mrs. Eliza Ega (nee Armstrong), said to me, -- "Don't play at that bad place where the dhrudes (druids), glory be to God! offered black cocks to the Devil!"
A Folklore Survey of County Clare (Continued)
Thos. J. Westropp
Folklore, Vol. 22, No. 1. (Mar. 31, 1911), pp. 49-60.
A Survey of Monuments of Archaeological and Historical Interest in the Barony of Bunratty Lower, Co. Clare by William Gerrard Ryan
This part of the thesis discusses the various types of monuments of archaeological and historical interest that were noted in the Barony of Bunratty Lower, Co. Clare. Each type of site is examined in turn, under the headings: distribution, features, dating and related sites in Ireland.
The "Wart Stone," or "Font," appears on the Ordnance Survey Map, No. 26, as "Doughnambraher Font." Thinking it very unlikely that there should be a font without a church, I came to the conclusion that there might be a bullaun at the spot marked. It is about three-quarters of a mile from Drummeen, or Barrycarroll Castle, and there is a sort of road all the way to it. We turned aside to visit the Castle, and so had to cross the fields to get to the bullaun.
We made inquiries once or twice from the inhabitants, and found out that the name of the place was Kyleane (three syllables), Killian on map; and that there was a stone there which would cure warts.
When we reached the place they pointed out, we soon found a large bullaun, of which I send a sketch. My friends thought it lay in a sort of fort, or enclosure, but I am not so sure. It is a large, flat sandstone, with one large basin in it, and something which looks like the beginning of a second. There are nine round stones in it which make part of the charm against warts: I suppose to turn them round like the Killeany stones.
We measured it as carefully as we could. The length of the stone is about 5 feet 7 inches, the width 3 feet 4 inches, while the basin is 1 foot 8 inches long, and 1 foot 3 inches wide. [...]
Miss G C Stacpoole reports in the 1904 volume of the Journal of the Royal Society of Antiquaries of Ireland.
The information via the Historic Environment Viewer describes the bullaun and its stones. It says the stone is also known locally as 'Jack Baker's Well' and is made of Old Red Sandstone. It contains 'seven water-rolled 'cursing' stones'. Situated in the basin of a ballaun stone lying in the perimeter of an ecclesiastical enclosure. Seven 'fist-sized' egg-shaped water-rolled stones lie in the basin which is sometimes waterfilled and associated with the cure of warts. There were previously ten stones although the number seems to vary up and down over time. Stacpoole includes nine stones in his [her!] drawing. 'Rounds' performed here involved rubbing each stone against the afflicted part of the body and placing an offering of some sort under the bullaun. In February 1993 this practice continued. While stones of this type are generally classified as cursing stones there is no known evidence of their use for that purpose in this instance.
In the townland of Kilcarrol in Thomas Keating's land there is a fort by the name of "The Fort of The Black Dog". There was a tree growing in the middle of it, one night a man was going to another house and as he was passing the fort a light appeared before him. The next thing he saw was a black dog. The man turned to run but the dog caught him by the coat and turned him back. The man took up a stick which was beside him and started to beat the dog, but the dog stretched him on the ground. They were fighting for a long time until a man came to them. They both killed the dog and they buried him near the tree and covered him with a pile of stones round, and the stones are to be seen yet and the tree also.
From the Schools Collection of the 1930s, currently being transcribed at Duchas.ie. The black dog isn't overtly described as supernatural (and it seems to be mortal) but its attendant light and habit of lurking about in a fort suggest otherwise to listeners of the story that know these symbols. The Historic Environment Viewer shows quite a collection of interesting things here - the rath, which contains a 'Foot Stone' according to the old 25" map (maybe a foot print of someone in stone?), and also Tobercarroll (a holy well), and a penitential station.