Plockton is covered, I suggest Stroma could be Strome which is a short boat trip from Plockton, at the narrow entrance to Loch Carron, north side. Cardanach and Ardmachin ring no bells. The only Ard.... name near is Ardaneaskan, on the point of land north east from Plockton. Is the lister struggling to read the parish register or is it a transcript that someone not familiar with the local names has interpreted? Tina