
St Fagan’s Natural History Museum, whose
URL is at:
http://www.museumwales.ac.uk/en/faq/plygain/ has a page on Plygain
Singing, a carol singing activity carried out on Christmas Eve in several
parts of Wales. This page is reproduced below:

'Plygain' Singing
Christmas Eve
Plygain Service at St Garmon's Church (RealAudio
16.0Kbps)

In many parts of Wales, Christmas meant rising early (or staying up
overnight) to attend the plygain service at the parish church. The hour for
the plygain appears to have varied between 3 a.m. and 6 a.m., the latter
becoming more common as time went on. To await the service, young people, in
particular, would pass away the time in one way or another.
In some country districts they would gather at certain farmhouses to make
cyflaith (treacle toffee) and spend the night
merrily, decorating the houses with holly and mistletoe, as at Marford,
Flintshire, in the 1830's. According to Mrs. Thrale's journal of a tour in
1774 the inhabitants of Dyffryn Clwyd kindled their lights at two in the
morning and sang and danced to the harp until the plygain.

In other districts, especially country towns, the time was spent playing
in the streets. In Tenby, Pembrokeshire, for example, crowds carried
torches, shouted verses and blew cow-horns, before finally forming a torch
procession in which the young men of the town escorted the rector from his
house to the church. A similar procession is recorded in Laugharne,
Carmarthenshire, and also in Llanfyllin, Montgomeryshire, where candles were
used instead of torches.
Plygain candles
In the countryside the plygain at the parish church was attended by
people from even the remotest farmsteads. Often each person brought his or
her candle to help to light the church since, until the nineteenth century,
regular services were rarely held at night-time and no provision for
lighting was usually made. The brilliant illumination from the candles of
the attenders was an important feature of the festival. In Llanfyllin,
special candles known as canhwyllau plygain were made by local chandlers in
the middle of the nineteenth century.

During the service the church was decorated inside with chandeliers
holding coloured candles and, in Dolgellau, for example, decked with holly.
In Maentwrog, Merioneth, candles were also fixed in sockets on the tops of
standards or posts fastened to pews here and there in the building. In
Lanfyllin the edifice was lighted with some hundreds of candles, placed a
few inches; apart from each other, around the walls inside which made the
building look very brilliant. In Maentwrog it was the carollers singing in
the little gallery at the bell tower end of the church who brought their own
candles for it was too dark in that part of the building to follow the
service in the Common Prayer Book.
While no doubt the custom varied in detail from parish to parish, the
brilliant illumination of the church appears to have made a lasting
impression on the memories of those who have left us descriptions, and to
have been a striking characteristic of the traditional plygain. As Gwynfryn
Richards has suggested, the spiritual significance of candle-lighting at
Christmas as a symbol of the coming of the Light of the World, may be
discerned in these practices.
The Plygain Service
The plygain itself was an abbreviated form of morning service
interspersed with and followed by carols sung by soloists and parties.
William Payne described the plygain in Dolgellau as he knew it in the middle
of the last century in the following words:
'Now the church is in a blaze, now crammed, body, aisles, gallery, now
Shon Robert, the club-footed shoemaker, and his wife, descending from the
singing seat to the lower and front part of the gallery, strike up
alternately, and without artificial aid of pitch pipe, the long, long carol
and old favourite describing the Worship of Kings and of the Wise Men, and
the Flight into Egypt, and the terrible wickedness of Herod. The crowds are
wholly silent and rapt in admiration. Then the good Rector, and his curate,
David Pugh, stand up, and read the Morning Service abbreviated, finishing
with the prayer for All Conditions of Men, and the benediction restless and
somewhat surging is the congregation during prayers the Rector obliged
sometimes to stop short in his office and look direct at some part or
persons, but no verbal admonishment. Prayers over, the singers begin again
more carols, new singers, old carols in solos, duets, trios, choruses, then
silence in the audience, broken at appropriate pauses by the suppressed hum,
of delight and approval, till between eight and nine, hunger telling on the
singers, the Plygain is over and the Bells strike out a round peal.'
In Maentwrog a sermon was included in the plygain service, but the rector
was careful to keep both sermon and service short, as he evidently felt that
the chief attraction was not the service but the carolling that followed it.
In other places, such as Llanfair Dyffryn Clwyd, holy communion was
administered during the plygain.
A Pre-Reformation Survival
Seen against its historical background the plygain is a survival of a
pre-Reformation Christmas service modified to suit the new Protestant
conditions. Richards points out that plygain in the sixteenth century
denoted an ordinary morning service and only at a later date came to be
restricted to the service held on Christmas morning. The plygain, he
suggests, took the place of the midnight Christmas mass of the Catholic
period and was originally associated with a communion service held later on
Christmas morning.
The practice of holding the communion service at eight o'clock ended the
earlier association between the plygain (morning service) at six, seven or
eight o'clock, and the High Mass at nine or ten o'clock. After the
Reformation, carol-singing in the vernacular, which had hitherto been
excluded from the Latin service of the church at Christmas, was incorporated
in the early morning Christmas service, and, as nineteenth-century
descriptions plainly show, had become the main attraction of the plygain.
John Fisher has drawn attention to the similarity between the Manx festival
of Oiel Verrey, held at midnight on Christmas Eve, and the Welsh plygain. He
points out that both became popular carol-singing festivals soon after the
translation of the Bible into the respective vernacular tongues.
Far from disappearing under the impact of Nonconformity in the nineteenth
century, the plygain was one of the few traditional church festivals not
discarded by Welsh Nonconformist chapels, although the character of the
service was sometimes changed by making it a variation of the ordinary
week-night prayer-meeting. As a general custom, the early-morning Christmas
plygain ceased towards the end of the last century, although in some cases
it survived to a later date.
The Carol-Singing Tradition in North Wales
In the past, all parts of North Wales shared a strong carol-singing
tradition. Nowadays, however, this tradition survives at its most intense in
the east midlands, in the predominantly Welsh-speaking areas bounded by
Mallwyd, Llanerfyl, Cefnyblodwel (within England) and Llangynog.
For the stranger, attending a plygain service is an unusual experience.
For almost two hours, the service is completely in the hands of the carol
singers. No programme has been prepared beforehand and no-one acts as
announcer, but, each in turn, the carol parties walk forward quietly and
leisurely forward to sing. On average there will be eight to fourteen
parties present and one is likely to hear between twenty and thirty
Christmas carols during the service - all in Welsh and all different, since
it is a point of honour not to offer a carol already heard that evening
Adapted from Trefor M. Owen, Welsh Folk Customs (Cardiff,
1959), pp. 28-33

Plygain Service at St Garmon's Church (RealAudio
16.0Kbps)
Listen to Parti Fronheulog singing Wel Dyma'r Borau Gorau i Gyd
(Behold the Finest Morn of All). This carol was recorded by the Museum
in a plygain service at St Garmon's Church, Llanarmon Mynydd Mawr, near
Llanrhaeadr ym Mochnant, Clwyd, 3 January 1965. Words (alliterative): David
Thomas 'Dafydd Ddu Eryri', 1810. Tune: a version of 'Ffarwel Ned Puw' (Ned
Pugh's Farewell). This recording is currently available on Carolau
Plygain / Plygain Carols (cassette C700N) released by
Sain Records Ltd.