During the nineteenth century many organ builders flourished in Dublin. The finest organ builder of this period was probably William Telford. Many of his instruments are still in Irish Churches. Unfortunately many are changed beyond recognition, others are slightly altered but a few are left as Telford built them. Much of the information in the present work has been gleaned from two particularly rich sources. The E.G. Barton Collection is a scrapbook of newspaper cuttings and Telford publicity compiled by Barton. The John Holmes Archive is a collection of information regarding Irish organ building. Nomenclature of stops was not standardised in Telford's day. Names and spelling are given here as found in each particular instance. This account of William Telford's life and work is only the starting point for a more detailed study of one of the finest craftsmen of the nineteenth century.