The water never ran dry, and drinking from it while saying prayers was understood to cure headache and earache. Children who drank there left behind rags, buttons, and small offerings at the rock. None of that is visible today. The well has been gone for decades, and the ground where it once sat is planted over.

The name recorded on the 1837 Ordnance Survey six-inch map is Toberagh, likely derived from the Irish toibreacha, meaning wells, suggesting there may have been more than one source at the site. By the time the later Cassini edition was produced, the notation had shifted to simply mark it as a site of a holy well, already acknowledging something lost. Writing in 1957, the scholar Ua Broin described what the Ordnance Survey letters had recorded: a stream emerging from rock, the rock itself marked on the survey drawing, along with what appeared to be a tau-cross, a T-shaped cross form, carved into a nearby stone. A separate block of stone with a small incised cross, roughly four inches by three, was remembered by local people as standing near the well. Both the cross and the well appear to have been disturbed or destroyed when the ground was cleared for the sanatorium buildings in the early twentieth century. In a detail that Ua Broin considered unlikely to be coincidental, patients at the sanatorium had, in the years following its opening, begun gathering to pray near the mortuary, quite close to where the well had been. An improvised kneeling board, pious pictures, and medals placed in the joints of dry masonry sheltered by laurel bushes marked the spot, until those too were removed and the area replanted. Folklore collected from Brittas School in the mid-twentieth century remembered the sanatorium entrance by the name Tubberacks, and recorded the well as Saint Ann's Well; a school in Firhouse placed Tobar na cCluas on Tallaght Hill and noted its reputation for curing ear and headaches.

The site lies in the townland of Crooksling, east of a river valley and the N81, within the grounds of what is now an Eastern Health Board nursing home. There are no surface remains visible. A visit to the area amounts to reading a landscape that has been thoroughly altered, where the interest lies almost entirely in the layering: a healing well, a sanatorium, and patients who found their way back to a place of prayer without, perhaps, quite knowing why.