Sentence:  Allan Ravenswood, that was then master, wi' a bended pistol in his hand, - it was a mercy it gaed na aff, -- crying to me, that had scarce as much wind left as serve the necessary purpose of my ain lungs, 'Sound, you poltron! sound, you damned cowardly villain or I will blow your brains out !” and, to be sure, blew sic points of war, that the <WSD>scraugh</WSD> of a clockin-hen was music to them. 
Meaning of the word marked with <WSD> tags:  A screech.