What's the instrument? Plucked cello, guitarron, ...?

Verbal oddity: the woman lives in "the dark" (not "in York", as in most British versions) but falls in love with "her father's clerk", which doesn't rhyme because they use the American pronunciation of "clerk". So somehow, lyrics and pronunciation have drifted out of sync, after some intermediate stage where they matched. She'd have to live in the murk to make them fit together again.