Recorded in 1936 as being possibly one of the most inaccessible wells in the entire country, it remains a challenge for pilgrims and curious visitors alike. The water emerges from the streambed and flows out as a small cascade, making the traditional practice of performing stations particularly difficult for those unfamiliar with the site.

The well’s dedication presents something of a mystery. No Saint Maurice appears in any of the Irish martyrologies, leaving local historians to speculate about its origins. The late Dr. Maguire of the Diocese of Raphoe suggested a connection to the Ó Muirgheasa family, who served as hereditary church wardens of Clonmany. This ancient Irish family name, properly rendered as O’Morris but locally anglicised as Morrison, may have lent itself to the well over centuries of local tradition.

The site sits within a landscape rich with mythological associations; nearby are the “beds” of both Diarmuid, the legendary warrior of the Fianna, and St. Columcille himself. Traditionally, pilgrims would visit the well to make their stations on 15th August, coinciding with the Feast of the Assumption, though summer visitors were known to perform the ritual on other days as well. Today, the exact location of Tobar Muiris remains lost, adding another layer of mystery to this already enigmatic holy site in the townland of Ardagh.