In "More Traditional Ballads of Virginia," the relevant line reads "You have two swords right by your side, And me not so much as a knife, knife, knife..." [page 180, Little Musgrave and Lady Barnard].

I have just spent about half an hour going through Child and other sources and most seem to agree with the above comment. In fact, Child does not seem consider Matty Grove at all. [Little Musgrave, Child 81]