To make Di Vernon convert him to Jacobitism would have been to repeat the story of Waverley.

Still, he would have been more sympathetic if he had been converted.

He certainly does not lack spirit, as a sportsman, or "on an occasion," as Sir William Hope says in "The Scots' Fencing Master," when he encounters Rashleigh in the college gardens.

Frank, in short, is all that a hero should be, and is glorified by his affection.
Of the other characters, perhaps Rob Roy is too sympathetically drawn.
The materials for a judgment are afforded by Scott's own admirable historical introduction.

The Rob Roy who so calmly "played booty," and kept a foot in either camp, certainly falls below the heroic.