For sale is a rare First Edition Nancy Drew book from 1931. It says 1931, but I have been told that it is actually 1947 with a rare misprint. It used "Dana Girls" endpapers instead of the Nancy Drew. You can look at pictures and decide for yourself.
"The Secret of Red Gate Farm" was published in 1931 by Grosset & Dunlap.
This has a blue cloth cover and is illustrated. On the inside cover is a "to Darlene from Aunt Dorthea" inscription.