author
d. 1974
Best known for contributing the advanced-strokes section of an early swimming manual, this little-known writer was part of a family closely tied to swimming instruction. His surviving published work offers a glimpse of practical, hands-on teaching from the early 1900s.

by Frank Eugen Dalton, Louis C. (Louis Cecil) Dalton
Louis C. Dalton, identified in library records as Louis Cecil Dalton, is remembered chiefly as the co-author of Swimming Scientifically Taught: A Practical Manual for Young and Old. Project Gutenberg’s author listing connects him with that book, and the text itself credits him with writing the chapter on advanced strokes.
The book places him at the Dalton Swimming School, where he worked alongside Frank Eugen Dalton. That suggests his role was less that of a literary career author and more that of a specialist sharing expertise in swimming technique and instruction.
Very little biographical information about Dalton appears to be readily documented online beyond his name, his association with the swimming school, and his death year, 1974. Because the available sources are so sparse, it is safest to remember him as a practical contributor to an enduring instructional classic rather than as a fully documented public figure.