Pinafores and Pantalets - 1931

I couldn't find out anything definite about the authors of this book. They are both credited with writing other things, so I presume they existed.
The review in Parents' makes it sound like the story took place in colonial times; but from this review of Pinafores and Pantalets it appears that 1864 was the year in which "children's lives where considerably simpler than they are now."

Considerably simpler, because we where only having a civil war at the time.

In 1931 the Civil War had ended 66 years previously. Because so many had enlisted so young, there where many civil war veterans still living in the 1930s. (Albert Woolson was the last surviving civil war veteran, he passed away in 1956.)