The description on the front of the card:
Blue Hole, Castalia, Ohio
Estimated Date: 1930-1940s
Collection: The Blue Hole
No. is Series: 29
Era: Linen Era
The description on the back of the card:
CASTALIA BLUE HOLE
Discovered by Robert Rogers, 1760, the most extraordinary Spring in existence. Unknown depth, visible depth 45 feet, and 75 feet in diameter, source of water underground river. Temperature 48 degrees winter and summer. It never freezes and is not affected by floods or drouth. Discharges 5,000 gallons of water every minute. Fish can not live in Blue Hole, as it is absolutely free from air or food. The water is blue in color and extremely clear and supplies water for a brook trout fishing club.
Distributor: E.B. Ackley, Sandusky, Ohio
Publisher: Genuine Curteich-Chicago “C.T. Art-Colortone” postcard, a tradename under Curt Teich Co., Chicago, Illinois.
Eugene B. Ackley (1871-1957) was a popular musician and bandleader in Sandusky, Ohio.
Read more about E.B. Ackley
The photos and images were created by E.B. Ackley, but the cards were printed en masse by the Curt Teich Company in Chicago, Ill., under the tradename, "C.T. Art-Colortone."
Established in 1898, the Curt Teich Co. was best known for its wide range of advertising and postcards of North America. By the 1920s, it was producing so many postcards with borders that they became recognized as a type dubbed “White Border Cards,” creating an “era.” Later, Curt Teich’s innovations in this printing technique directly led to the production of what we now call “linens” by the early 1930s.
Read more about the Curt Teich Co.
Rights Info: Most likely public domain due to inadequate copyright statements, but it would be best to credit the original publishers and distributors.