Set into the main gate was a judas gate, and set into the judas was a 
small hatch. Below the hatch was a great bronze knocker made in the shape of a 
letter T, though its shape had become indistinct from an encrustation of moss 
and lichens. Princess Nell operated the knocker only with some effort and, 
given its decrepit state, did not expect a response; but hardly had the first 
knock sounded than the hatch opened up, and she was confronted by a helmet: For 
the gatekeeper on the other side was dressed from head to toe
in a rusty and moss-covered suit of battle armor. But the gatekeeper said 
nothing, simply stared at Princess Nell; or so she assumed, as she could not 
see his face through the helmet's narrow vision-slits.