From the OHS PC Database, derived from A Guide to North America Organ Builders by David H. Fox (Organ Historical Society, 1991). --

London (Soho), England, Founded by Joseph William Walker. Active by 1827. His 3 oldest sons died. He was suceeded by James John Walker, his youngest son, then by J. J. Walkers sons, E. F., J. H. P., F. P. and R. H. Walker.