Cydymaith yr ysgol Sabbathol
An irregular Welsh language religious periodical intended for the Sunday schools of the Calvinist Methodists. The periodical's main contents were religious articles and Sunday school lessons, alongside reports on the activities of the Sunday schools. The periodical was edited by John Griffith.
Publication Frequency: Irregular
Publication Language: Welsh
Publication Location: Dolgellau
Publisher Details: Owen Rees
First Available Issue: 1859
Last Available Issue: 1860