On either side just below the handle , where the Runic letters shivered as though they were alive , were two deep gouges in the dull , deadly steel .<br>' Now , what Thing made those ? '<br>said he . '<br>I know not , but you , perhaps , can say . '<br>' Tell them all the tale , Sir Richard , ' said Puck .<br>' It concerns their land somewhat . '<br>' Yes , from the very beginning , ' Una pleaded , for the knight 's good face and the smile on it more than ever reminded her of ' Sir Isumbras at the Ford ' .

Can we draw the following conclusion?
Sir Richard and Sir Isumbras are both runic knights.
It's impossible to say