Flynn’s Crossing, also called See Crossing and Irish Crossing, was a name for the neighborhood north of Pleasantdale and Campbell’s Crossing and west of Speigletown around where the Troy and Boston Railroad track had crossed Irish Road in the Thieves Hollow area, north of where the Pleasantdale Rod & Gun Club now is.

Given that the crossing itself was at-grade, there were several bad accidents at it.

Detail of 1861 Rensselaer County map showing Campbell's Crossing at bottom and Flynn's Crossing towards top.

Detail of 1861 Rensselaer County map showing Campbell’s Crossing at bottom and Flynn’s Crossing towards top.

SUDDEN DEATH—Two were killed late yesterday afternoon at this crossing north of Speigletown by a south-bound Rutland R. R. train.  Picture above shows the twisted car tossed to the roadside.  The crossing, known as Flynn's Crossing, is on a dirt road connecting the River Road with the Melrose highway. Times Record [Troy, NY]. September 7, 1944: 14 cols 1-3.

SUDDEN DEATH—Two were killed late yesterday afternoon at this crossing north of Speigletown by a south-bound Rutland R. R. train. Picture above shows the twisted car tossed to the roadside. The crossing, known as Flynn’s Crossing, is on a dirt road connecting the River Road with the Melrose highway.
Times Record [Troy, NY]. September 7, 1944: 14 cols 1-3. (From scan by Fultonhistory.com)