He apprenticed at Mason & Hamlin in Chicago where he learned to build pump organs .
John L. Hinners ( 1846 -- 1906 ) was the son of German Methodist Episcopals and originally a carpenter by trade .
John L. Hinners apprenticed at Mason & Hamlin in Chicago where John L. Hinners learned to build pump organs .
John L. Hinners ( 1846 -- 1906 ) was the son of German Methodist Episcopals and originally a carpenter by trade .