Hardly new. > But your father doesn't want to invest, say, ten thousand dollars in it, though I can almost guarantee that he'll get five times that sum back.

Hardly new. > But your father doesn't want to invest, say, ten thousand dollars in it, though I can almost guarantee that he'll get five times that sum back. Tom Swift and His Giant Cannon 1913 https://www.gutenberg.org/files/1361/1361-h/1361-h.htm https://www.gutenberg.org/files/1361/1361-h/1361-h.htm