Some 60 years ago, I was reading a science-fiction book in which an adult was with two children, ca. 12 years old, on a trip of some sort. While they are out walking, he sang “Men of Harlech” to them; the words for a verse or two appear in the book:
“Men of Harlech in the hollow, do ye hear like rushing billow …”, &f.
I recalled nothing else of the book until a few days ago when I suddenly recalled that a planet named “Lepton” figured in the book somehow; I thought this additional detail might be enough to find the book.
The reason for such vagueness, beyond the 60-year time lapse, is that I never finished the book. I was perhaps 9 or 10 years old, but this wasn’t a children’s’ book; the librarian jerked the book from my hands, telling me to “stop pretending to read that book” and go pick a book from the children’s’ section instead. I could read the newspaper before I started 1st grade, so I was by no means pretending, and I wasn’t interested in children’s’ books.
My mother had a somewhat heated talk with the librarian sometime later, and the librarian never bothered me again on subsequent visits. But I was unable to locate the book again.