This one, on a south-facing slope of rough pasture at Houndswood in County Mayo, has quietly moved. The original spring source appears to have shifted some three metres to the south over time, and the spot where it once emerged is now marked by rough masonry, a kind of accidental monument to the well's own migration. It sits beside a children's burial ground, known in Irish tradition as a cillín, a place set apart for the unbaptised dead who could not be interred in consecrated ground. The pairing of a holy well with a cillín is not unusual in the Irish landscape; both occupied a liminal space, neither fully within nor fully outside the formal structures of the Church.

The well carries the name Toberaninyaun, as recorded on the Ordnance Survey six-inch map of 1929. The first element, tobar, is simply the Irish word for well, and such placename compounds are common across the country, often preserving a dedication or a local association that has otherwise been forgotten entirely. What the second element, aninyaun, refers to here is not recorded, though it may preserve a personal name or a now-obscure devotional tradition associated with the site. The well and its surroundings were documented in a 1994 archaeological survey of the Ballinrobe district, which also covers the areas around Lough Mask and Lough Carra to the west.