From Richard Kassel, "Hutchings" in The Organ: An Encyclopedia edited by Douglas Bush & Richard Kassel (Utah and New York: Psychology Press, 2006), p.265 --

George Hutchings, Mark Plaisted, and G.V. Nordstrom (all former Hook & Hastings emplyees) joined with organist and consultant John Henry Whote to form J.H. Wilcox & Co. In 1872, it became Hutchings,Plaisted, and Co.