The second class of musical bards was composed of the players upon the crwth, of six strings.
"A Popular History of the Art of Music" by W. S. B. Mathews
Crwth bow from the Golden Porch at Freiburg .
"The Bow, Its History, Manufacture and Use" by Henry Saint-George
This instrument became the crwth, and there was no further development.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7" by Various
A crwth, an antiquated Welsh instrument of the fiddle class.
"Musical Myths and Facts, Volume I (of 2)" by Carl Engel