Marked simply as 'Gallan (on its side)', the annotation suggests the location of what may have been a recumbent standing stone; a monument that once stood tall but now lies horizontal, perhaps toppled by time, weather, or human intervention. The Irish word 'gallán' traditionally refers to a standing stone or pillar, making this cartographic clue all the more tantalising for those interested in Ireland's prehistoric landscape.

The exact fate of this stone remains something of a mystery. Whether it still rests somewhere in the fields of Drumnaskea, buried beneath centuries of soil accumulation, or was long ago broken up for building material is unknown. What we do know is that such stones were common features across the Irish countryside, often marking ancient boundaries, burial sites, or serving ritual purposes for communities stretching back thousands of years. The fact that a 19th century surveyor thought it significant enough to record, even in its fallen state, speaks to its probable importance in local memory and tradition.

This potential monument sits within the wider archaeological landscape of County Donegal, an area rich with prehistoric sites including stone circles, cairns, and numerous other standing stones that still remain upright. The notation serves as a reminder that Ireland's ancient heritage isn't always immediately visible; sometimes it exists only in old maps, place names, and local stories, waiting to be rediscovered or properly investigated by future generations of archaeologists and history enthusiasts.