Aberfoyle or Aberfoil?

The recommended ride for day one from Callander is a loop around Loch Katrine, deep in the heart of Rob Roy country. While taking the ferry from Stronachlachar for Trossachs Pier is recommended, I think I'll ride the full loop through Aberfoyle and Three Lochs Forest Drive. I'll see the full loch on my ride westward.

Classics Illustrated discussed the planned meeting between Rob Roy and Francis in the glens at the "Clachan of Aberfoil". I've got to check that out.