Jeannette I presume you are thinking of the River Tolka in Dublin. However, I have had a look on the Internet, and there appears to be a ruin of Castle Sheppard in Co.Tipperary. See - http://landedestates.nuigalway.ie/LandedEstates/jsp/property-show.jsp?id=4586 and also http://www.castlesheppard.com/ The second link has a photo of the ruin. Hope this helps. Joyce >> > Does anyone know if Castle Sheppard is on the River Tolca. The > castle/house > I understand is now a ruin. Any info on Castle Sheppard would be > appreciated. >