Church and chapel data from The Religious census of 1851 : A Calendar of the returns relating to Wales, Vol 11, North Wales. Ed. by Ieuan Gwynedd Jones, UWP, 1981. The names given towards the end of each entry are those of the informants.
Parish statistics; Area 7794 acres; Population 477 males, 478 females, total 955
Llandderfel Parish Church Attendance - morning 48 + 10 scholars, afternoon 27 + 9 scholars Services in Welsh John Jones, Rector
Rees, Thomas & John Thomas. Hanes Eglwysi Annibynnol Cymru (History of the Welsh Independent Churches), 4 volumes (published 1871+). Here is the entry from this book for Soar chapel (in Welsh ) - with translation Also Bethel chapel (No translation) Also Llandderfel chapel (No translation)
Bodwenni Estate Papers [13th century]-1953 (mainly 1540-1894) "The Bodwenni estate, Llandderfel, Merionethshire, was owned by Ellis ap David in 1630............"
Fronheulog Estate Records "Deeds and documents, 1660-1922, from Bronwylfa, Llandderfel, partly relating relating to the Fronheulog estate and to the Williams family of Fronheulog and Menairafon, Angelsey....."