Archive.org
One could spend a lifetime browsing www.archive.org so this is the place to put the shortcuts to the folk related content.
- The Esperance Morris Book Volume 1 [1]
- The Esperance Morris Book Volume 2 [2]
These two volumes were created by Mary Neal and published in 1910. They are freely available in various formats.
The description reads: pt 1. A manual of morris dances, folk-songs and singing games.--pt. 2. Morris dances, country dances, sword dances and sea shanties. Notes and steps written by C. Carey; music collected and arranged by G. Toye and C. Carey
- The Morris book : with a description of dances as performed by the Morris men of England (1912-) [3]
Sharp, Cecil J. (Cecil James), 1859-1924 with MacIlwaine, Herbert C