A collection of diaries dating from 1875 to 1935. They cover the period when W. Pari Huws was a student at the Bala College when Michael D. Jones was Principal and also the time when he visited the Yale Seminary in the United States. There is also an address on the centenary of Dolwyddelan Congregational Chapel, Caernarfonshire by him,1917.
Four diaries belong to William Hughes (Gwilym Prysor) from 1867 - 1870.
One document is described by the cataloguer as the book of John Williams (Ioan Rhagfyr), poet and musician, 1740-1821. It contains poetry, hymns and carols by him, along with contributions in other hands. There are details of allotments under the common land laws in Dolgellau at the beginning of the 19th century and a few medical notes. The book is dated c. 1803 - 1825.