Yr athraw : cylchgrawn misol

A monthly Welsh language religious periodical that served the Sunday schools of the Unitarian denomination. Alongside articles on religious matters the periodical also published articles on more general subjects, including history and biography. The periodical's editor was the Unitarian minister, writer, schoolmaster and social reformer, William Thomas (Gwilym Marles, 1834-1879).

Publication Frequency: Monthly

Publication Language: Welsh

Publication Location: Aberystwyth

Publisher Details: D. Jenkins

First Available Issue: 1865

Last Available Issue: 1867