There are plenty of Celtic saints with names that start with 'C', Cadfael, Cuthbert, Colombo but I shall choose Caedmon, who wrote the above hymn whilst at Hilde's Whitby Abbey. It wasn't always called Whitby, the original name was Streoneshalh, butafterthe Northern invasions it was called Whitby - White Bay.
The story told by Bede in his book - An Ecclesiastical History of the English People, is that Caedmon, a poor cowherder and also illiterate composed the first hymn. Bede translated it in Latin but other translations were Saxon, so if you know anything about Saxon writing of the time, each line of a poem is divided into two. There are plenty of videos either singing or saying this hymn, but it is a rabbit hole that one fears to go down.
At one stage I fell in love with the sober tones of the organ, and also strangely enough with the chanting of monks. There is something soothing in such music. My records years ago reflect this, but then the old records are a thing of the past.
Looking at the Breverton book and I see that he says that the very first carol service in 1878 was held on Christmas Eve and was in Truro, Cornwall, he says
"The earliest carols were pagan chants and dances associated with fertility rites and the passing of the winter solstice". Some carols are as recent as the 19th century, whilst others refer to earlier times. Interestingly, the carol Partridge in a Pear Tree, is a symbolic way of teaching children, who could not go to church the basics of the bible. For instance - Two turtle Doves - Old and new testament. No wonder we love carols, well I do at least, the spontaneity of singing the 'Holly and the Ivy' or 'Away in a Manger' is a bit like the nursery rhymes of old.