The Dobhar-chú of Glenade Lough and the death of Grace Connolly

Glenade Lough is a small lake in County Leitrim. It is 1.6 km long and up to 11.5 m deep, about 9 km northwest of Manorhamilton. Irish tradition told of a creature that lived in such waters. The Dobhar-chú. The water hound. The master otter. Nobody alive today saw what happened here. The record comes from a carved stone, a 1948 antiquarian paper, 1930s oral tradition and a ballad.

By tradition it happened at Creevelea, at the north-west corner of the lough. Grace Connolly, Gráinne Ní Chonalaí in Irish, went down to the water to wash clothes. A beast came out of the lake and killed her. Her husband, Terence McGloighlin, found her mutilated body. The Dobhar-chú was sleeping on top of it. One account says it was sucking her blood.

He ran home for a dagger and killed it. As it died, the creature called out. Its mate came out of the lake.

Terence fled on horseback, with his brother in some versions. The second beast followed. One telling starts the chase at Frank McSharry's in Glenade and runs it about twenty miles to Cashelgarron, a stone fort at the foot of Benbulben in County Sligo. A 1930s school account remembers the moment. "It was coming nearer and nearer." At the fort the riders set their horses across a gap as a barrier. The creature drove head first through a horse. A second school account, from Grange, tells the end. "The dobharchú rushed right through the horse but just as he was coming out McLoughlin cut off his head."

The story has an anchor. In Conwal graveyard, near Kinlough, lies a sandstone slab. Patrick Tohall read its inscription in 1948 as "Grace Con, wife of Ter MacLoghlin," dated 24 September 1722. He described the carved beast as "a recumbent animal having body and legs like those of a dog," with "the long, heavy neck and the short head" of an otter. It has large paws and a long curved, tufted tail. A dagger is stabbed in its throat. By June 2014 the inscription was totally worn out. A second carved stone, at Kilroosk, was said to show Terence. It broke in two and has since disappeared.

The tale was still alive in the 1930s, when it was written down for the Schools' Collection. In the Kinlough version the woman is Kate Connolly and the hero is her husband Glancy. There, the carving is on his grave, not hers. The Grange version explains a place name. Caiseal an Ghearráin is named for the horse the dobharchú killed there. Later retellings make the creature about 7 ft long. Tohall concluded that it was the seventh cub of the common otter, a super otter of folk belief. Karl Shuker favours an unusually large Eurasian otter for modern reports. In 2017 the Independent raised the prehistoric Siamogale melilutra, though that animal lived in Late Miocene China. No source raises any claim of a hoax.

Glenade is not alone. At Lough Mask around 1674, a creature of "a black slimy skin, without hair" was wounded with a knife. Reports continued into modern times, at Sraheens Lough on Achill in 1968 and at Omey Island in the early 2000s. A ballad, attributed to a hedge-schoolmaster, keeps the Glenade story alive, and Joe McGowan reproduces it on sligoheritage. Ruth Le Gear's art project Water Senses scanned the Conwal stones in 3D. And near Kinlough, the beast still lies carved in stone, a dagger in its throat.