Sentence:  ... the wind dying away, the signal was made for casting anchor, when both ships came to in 26 fathom water; but the Resolution expecting to come to with her small stream anchor, let the whole run out, and lost both anchor and hauser, besides the ship's <WSD>grapnel</WSD> in looking for it. 
Meaning of the word marked with <WSD> tags:  A grappling iron.