In 1868 the Aberffraw parish included 9 tythings, and the living (a rectory in the diocese of Bangor) had a value of  £888, in the patronage of the Prince of Wales.
(In terms of value, using the retail price index as the measure,  £888 in 1868 was worth over £57,000 in 2007.)

In the same year, Llantrisaint parish, the living (a rectory in the diocese of Bangor) had a value, with the curacies of Ceidio, Gwredog, Llanllibio, and Lllêcheynvarwydd, of £915, in the patronage of the Bishop.
(In terms of value, using the retail price index as the measure,  £915 in 1868 was worth almost £59,000 in 2007.)

Remember, a few years earlier the Rev. Hugh Wynne Jones, MA (Rector of Aberffraw 1815-1850) held both livings giving him an income of over £116,000 pa in 2007 equivalent value terms. (This assumes that the livings were worth similar or equivalent amounts 20 years earlier.)

By way of comparison in the same year, Llangadwaladr, 2 miles east of Aberffraw, The living (a rectory in the diocese of Bangor) had a value of £245, in the patronage of the Lord Chancellor.
(In terms of value, using the retail price index as the measure,  £245 in 1868 was worth under £15,800 in 2007.)

Meanwhile the average worker's wage in Anglesey in 1860 was 19s 6d (just under £1) per week or about £50 pa.
(In terms of value, using the retail price index as the measure,  £50 in 1868 was worth £3,218 in 2007.)

No further comment is really necessary.

The data used above come from the 'The National Gazetteer of Great Britain and Ireland (1868)' for information about the parish livings and from the 'AHDS History UK Data Archive', University of Essex, Colchester, CO4 3SQ for the data concerning average weekly income.

The money value conversions were performed using the calculator at http://measuringworth.com/calculators/ppoweruk/ - used with thanks. 

 In the early part of the 19th Century the Established Anglican Church enjoyed a position of extraordinary influence in society throughout Wales and England.  It was the official state church, it had its own court system, with virtually exclusive jurisdiction over wills, marriages and divorces and it was entitled to one tenth of the nation's farm produce each year through the tithing system.

The local representative of the church was the vicar, rector, or perpetual curate of the parish. His post was officially known as a "benefice" or a "living" and it could be used to maintain a handsome life-style.  The minister was entitled to all or part of the local tithes, the mandatory annual payments by parishioners to sustain the church.
The only formal obligation was to preach one Sunday sermon each week.

In later years, such livings generally passed into the hands of large landowners and then people might curry favour with the patron to get the post, since the church would not usually ordain someone as a full priest unless he had a living to go to.  Since they carried a nice steady income with them such livings were widely bought and sold just like annuities. Some were simply given away.

Altogether different was the curate, a full-fledged clergyman but without a  living of his own.  He assisted the rector or vicar to run a parish. The curate was, in fact, a source of cheap labour who often made life very easy for the clergyman who held the living but didn't want to do parish work except to preach the mandatory Sunday sermon. The curate's stipend was so inadequate and his prospects so poor that it was normal for him to do  perform the minimum duties prescribed by the law of the land. His salary would be similar to other local workers. In Anglesey, in the mid-19th Century, this would be around £50 pa. The chances of a curate obtaining a living were meagre unless he had an influential patron.

However, there were exceptions such as the Reverend S Rowlands who was curate of Aberffraw for thirty years during the early part of the 19th Century. During this time he enjoyed the highest respect of his parishioners. He was even praised by the first Wesleyan missionaries. It was he who provided Nicholas Carlisle with information about Anglesey for inclusion in the "Topographical Dictionary". His long and faithful service did not, however, bring him preferment.