The wall was unusually high as though to obscure a view of anything that lay on the other side.
Quest noticed with interest that, in places where it had shown signs of crumbling away, it had been repaired.

He contemplated the lock thoughtfully and drew a little instrument from his pocket, an instrument which had the appearance of a many-sided key.
"Looks like storming the fortress, eh ?" he remarked.

"Here goes, any way." The gate swung open with a single turn of the wrist.

Quest glanced for a moment at the lock and replaced the instrument in his pocket.
"The Professor's not looking for visitors," he muttered.

"Gee! What a wilderness!" It was hard to know which way to turn.