Outtakes from the making of this film have circulated on video and online for decades as being among the only surviving film "bloopers" to feature future president Ronald Reagan.
Bill is staying at the Hotel Pennsylvania. Olive finds this out from Sally over the phone in the morning. Olive hangs up and then asks the operator for the Hotel Pennsylvania. She's aggravated that the operator doesn't know the hotel's number. Audiences at the time would have found that very humorous because Glenn Miller's big band made it famous with their 1940 hit tune "PEnnsylvania 6-5000."
The film's title is taken from the Bible - Song of Solomon, Chapter 2, verses 10-12. The "turtle" in the King James Version meaning the bird "turtledove."
Bill gives a cab driver the address of Sally's apartment as the corner of 63rd St. and Lexington Avenue. That would put it in the Lenox Hill neighborhood of Manhattan's fashionable Upper East Side. It was as the time, and still is, a very upscale and expensive area of New York City.
This film has not been shown on television under its original title for years. In the 1950s, The Voice of the Turtle (1947) was re-released and shown on television under the title One for the Book. Until recently, it was always shown under its re-issue title, "One For the Book." Perhaps as a matter of policy, TCM uses the original title "The Voice of the Turtle."