"My uncle was busy decoding it, seated in this room, at that table, when he died." "His death was very sudden," Jesson ventured.
"I have not the faintest doubt but that he was murdered," Nigel declared.

"The document upon which he was working disappeared entirely except for one sheet." "You have that one sheet ?" Jesson asked eagerly.
Nigel produced it from his pocketbook, smoothed it cut, and laid it upon the table.
"There are two things worth noticing here," he pointed out.

"The first is that the actual name of a town in Russia is given, and a telephone number in London.

Kroten I have looked up on the map.

It seems to be an unimportant place in a very desolate region.