For well over a century and a half, the wrong well carried St. Brigid's name on the official map. When the Ordnance Survey came through County Kildare in 1837, they marked a spring in the nearby townland of Tully East as St. Brigid's Well, a designation that went uncorrected for decades. The actual site, according to Fitzgerald writing in the early 1900s, lay neglected on a small commons in Brallistown known locally as "The Grallach", a name that translates roughly as a miry or boggy place. The misidentification meant that the true Tobar Bríde, as it is called in Irish, sat quietly in its marshy corner while another spring enjoyed its reputation.

What Fitzgerald found there was a strong, clear flow of water passing through a pair of flat stones lying side by side in a ditch. These were locally known as St. Brigid's kneeling-stones, though Fitzgerald identified them more prosaically as water-shoot stones, flat slabs used to direct the flow of a spring rather than objects of devotion in themselves. A pattern, meaning a communal pilgrimage and gathering at a holy well or saint's site, traditionally held on the saint's feast day, had once been celebrated here, and by the account of Jackson, writing in the late 1970s, it had been a famous one. It fell into disrepute, however, reportedly from a lack of piety among those attending, and was eventually abolished by the parish priest of Kildare. Seven stations beside the well had also formed part of the devotional practice there.

The site today looks quite different from the neglected commons Fitzgerald described. The spring is now enclosed within a low circular mortared stone wall, roughly 1.2 metres across, with a small gap on the eastern side. A stone cross stands on the wall to the west, hung with scapulars and St. Brigid's Crosses. An overflow pipe carries water eastward to a stone arch over a second well and the kneeling-stones, marked by a date stone of 1952. The whole arrangement sits within a narrow, rectangular contemplative garden about 58 metres long and 8 metres wide. In the south-western corner, a pine tree serves as a rag bush, a tradition found at holy wells across Ireland whereby visitors tie cloth, threads, or small personal objects to a nearby tree as an act of supplication or thanks. The items left here include cloth strips, rosaries, baby socks, soothers, shoe laces, and peat briquettes. A marble plaque records that the stone surround was built by the Murphy and Fitzpatrick families and their neighbours, under the direction of Fr. Peadar Swayne.