John Frederick Blennerhassett (b.1835 d.1904).
Hydraulic engineer 1870-1904, maker of Hydraulic Engines for Organs.
Teacher of Organ Music 1881-1891
Proprietor of Blennerhasset's "West Central Organ Studio" and "West Central Organ School" at 1A & 1B Vernon Street, Kings Cross Road, Pentonville, London 1870-1904. Here he designed organ hydraulics, to be fitted to his own and to organs made by other manufacturers. He also sold organs and gave organ lessons. Sadly, this building has been demolished.