My very belated sincere thanks to HotelWhiskey7 and CandleDave for the chess-move info. I had assumed that the leaping from letter to letter would take the hunter from the top of the grid, to the bottom. Having made the correct leaps, I think the start & end points being on the same row of cells somewhat detracts from what is otherwise a brilliant puzzle.
I've now changed a G/O choice in cell 31 to an O as the second letter of the successful hunter's surname. This has presented me with a new problem, as I was going to use the G for the last part of the preamble.
Given that there are 4 occurrences of this letter in the grid ( Cell 7, Cell 20, Cell 31, and the 5th letter of 44 Across), can anybody help me out with which of these I should use. Or am I thinking of entirely the wrong quarry? It would be nice if the quarry was somewhere near the last letter of the surname, which I have at Row 1 Column 3.