That region around the drain's mouth is wholly deserted.

By working without lights there isn't a chance of being detected." "Thirty millions!" repeated London Bill, grinning cynically, "and all in five-thousand-dollar sacks! Did it ever occur to you that it will take some time to carry the gold down to the drain's mouth?
It's close by three-quarters of a mile, that trip is." "My friend," retorted Storri, with just a tinge of patronage, "leave that to me.

I'll find a way to send the gold to the drain's mouth without breeding any backaches.

All you are to do is dig the tunnel, and dig it so we can reach the gold." "That's simple," observed London Bill.

"I shall dig so as to undermine an end of one of those steel slabs that make the vault's floor, running my tunnel for the rear end of the vault.