You know all about that, Vladimir ?" "I know where it is.

I do not understand such devil's work, but I am an old man, and stupid." Fred laughed.
"Perhaps it's devil's work, but if we have any luck it will be pretty useful to us," he said.

"Come on, if it's safe for me to come out.
There's a lot for me to do." Vladimir led the way to the top of the house.

On the roof, like a pent-house, there was a little room or cupola, and in this was a partially dismantled wireless installation.

Fred was left there alone while Vladimir went off to get the things that Ivan had given to him for safekeeping, and he studied the installation closely.