It appears on the 1838 edition of the Ordnance Survey six-inch map, marked by name in Roman script, which tells you roughly where it was but nothing about what it looked like. When someone went to look for it in August 1984, they found no surface trace at all.

The monument was probably associated with St Leo, a figure connected to the early Christian heritage of the island. What form it originally took is uncertain. It may have been a leacht, a low cairn-like structure built from stones and typically associated with early Christian devotion and prayer, examples of which survive elsewhere on Inishshark. Alternatively, it could have been a wayside cairn, a simple accumulation of stones marking a path or a place of local significance. The island was permanently evacuated in 1960, when its last remaining inhabitants were resettled on the mainland, and the slow disappearance of such small monuments, untended and unrecorded in detail, is a pattern repeated across the abandoned islands of the west coast. Whatever St Leo's monument once was, it had left no mark on the ground by the time anyone thought to record it formally.