The following information is from Graeme Rushworth's magnum opus "Historic Organs of New South Wales".
"The organ building business William Telford founded in 1830 in Dublin, Ireland, survived long after his death in 1885.
Of superior quality, the firm's work was regarded as the Irish counterpart of Henry Willis in England, and the Telford name became the most well-known of the organ builders in Ireland in the 19th century.
From his workshop at 109 St Stephen's Green, Dublin, William Telford and his successors produced instruments of exceptional integrity, with durable mechanical action and pipe work voiced in classical style, despite the general trend to romantic tonal concepts in the second half of last century.
It has been suggested this was due to Irish conservatism, but it might also have resulted from a perception of the enduring and more musical qualities derived from low wind pressures, moderate pipe scales, and properly constituted diapason choruses.
Telford and Telford were responsible for instruments both large and small, for most of the cathedrals in Ireland, as well as for village churches and residences. Their work was chosen by many churches and individuals in England, as well as further afield in New Zealand, Fiji, and Australia.
The business continued until 1950 when it became partly owned by R. E. Meates & Son of Dublin, four generations of the Meates family having been employees of the Telford firm."