Tarr, Par. of Port of Menteith, PER, SCT

rightly or wrongly, my working assumption is that Tar(r) / Tarr() of Ruskie appears on modern maps as Lower Tarr (with Little Tarr on Google being Upper Tarr). I have also geo-coded Tarr to the same coordinates, although I suspect that is a more general historical area???

Tarr, Port of Menteith, PER, SCT

NB map coordinates assume that current Lower Tarr farm is both "Tarr" and "Tar of Ruskie" and Little Tarr on current maps is Upper Tarr from the older OS maps. Easter Tarr is further, you guessed it, east.