Second Stage Lensman ran as a serial in Astounding in 1941 and 1942. The hardcover was printed by Fantasy in 1953. You could have gotten it then for $3. 308 pages, including a tongue-in-cheek thanks to the Lensmen and other "historical" figures who cooperated with the writing of the book.
A quote:
"Do not get excited -- to do so dulls the mind. Take nothing for granted, do not jump at conclusions -- to commit either of those errors will operate powerfully against success. Working hypotheses ... must be based upon accurately determined facts; not upon mere guesses, superstitions, or figments of personal prejudices."