Correct me if I am wrong, but I believe LLoyd Bridges wrote a book titled Mask, Fins, and Snorkel. That is how we were taught, you started out freediving, and if you like it, you went on to diving. If not, there's nothing wrong with snorkeling. Rich
In my modest diving library I have a first-edition copy (1960) of the book entitled "Mask and Flippers: The Story of Skin Diving", whose publishers, Chilton of Philadelphia and New York, attributed authorship to "Lloyd Bridges, as told to Bill Barada". In spite of its title, just one chapter is devoted to "basic equipment", i.e. mask, fins and snorkel, and the bulk of the book, other than its overview of diving history, is about SCUBA diving. The term "SCUBA" is actually used in a chapter heading. The term "skin diving" in the book's title and elsewhere within its pages covers both breath-hold and SCUBA diving. Many titles in the 1960s used the term "skin diving" in this way, emphasising the distinction from hard-hat diving, where a thick canvas suit was worn.
We may all remember Lloyd Bridges because of his Mike Nelson role in the TV series "Sea Hunt" but negligently forget the real-life diving history role of Bridges' collaborator Bill Barada, who not only invented the first rubber "J-shaped" snorkel but also designed the Aquala historical drysuit which is still sold today.
Bill Barada - NOGI
The brief autobiography above uses the term "free diving" to describe how Bill Barada's underwater odyssey began in 1935, but immediately qualifies the term as historically inaccurate by using the contemporaneous term "goggle fishing" as more appropriate in the chronological development of underwater swimming and diving. Goggle fishing sounds right, certainly in the context of Guy Gilpatric's seminal pre-World War II work entitled "The Compleat Goggler".
The modern use of the term "free diving" to denote, exclusively, breath-hold diving in the first post-war decades is an anachronism. On my shelves I have three books from the 1950s with "free diving" in the title:
A Manual for Free-Divers using compressed air by D. M. Owen (Pergamon, 1955)
Free Diving by Dimitri Rebikoff (Sidgwick and Jackson, 1955)
The Complete Manual of Free Diving by Philippe Tailliez et al. (G. P. Putnam's Sons, 1957)
They all have pictures on the front of divers using SCUBA gear and the bulk of their content is about SCUBA diving, not breathhold diving. The deployment of the words "free diving" in the titles and contents of these books was probably inspired by the French term "plongée libre", literally "free diving", which was one of several terms coined in France to describe diving untrammelled by the hard-hat diver's hoses and cables. The use of the term "free diving" to mean diving to the depths without the assistance of artificial breathing apparatus must have begun later, possibly the 1970s in the prime of Jacques Mayol. Back in the 1960s, when I began snorkelling in the UK, I and other Europeans wouldn't have recognised the term "free diving" as describing what we were doing. We would have spoken about "underwater swimming", perhaps "snorkel diving". Our contemporaries in the United States would likely have used the term "skin diving", making clear at the same time that they were using just fins, masks and snorkels, because "skin diving" could mean SCUBA diving as well.
Sorry for so much historical exposition, but I do think terms such as "skin diving" and "free diving" need to be explored more deeply because they have broadened, and narrowed, their meanings over time. Having snorkelled for half a century, I'm not prepared to call my favourite activity "free diving" because (a) it once meant any kind of skin and SCUBA diving and (b) it is now too associated in my mind with breath-hold diving to extreme depths using low-volume silicone masks and plastic fins with long carbon-fibre blades. Personally, I wouldn't be seen dead in either, but hey, that's just me. At my age I'm entitled to regard change, particularly change I don't see the point of, with suspicion. I was brought up in the old school of "if it ain't broke, why fix it?" and the last time I looked, my full-foot all-rubber fins and my rubber-skirted oval mask both still functioned in the same way they did when the designs first came on the market decades ago: perfectly comfortably and efficiently.