The firm Loring & Churchill was formed by Henry William Loring and Gardner Asaph Churchill in 1859 in Boston.

"Henry William Loring was born in Boston, December 28, 1807.  He died in Hammonton, New Jersey on February 23 1885.  He is listed in the Boston directories from 1831 to 1858 as a jeweler, watch maker and mathematical instrument maker.  1859-60 Loring (Henry W.) & Churchill (Gardner A.) mathematical instruments;  1863-65 Loring, Henry W. Mathematical instruments.  H. W. Loring may have been employed by Charles G. King at 7 Broad Street because they both have the same address from 1850 to 1857.  Both had the same address, 72 Washington Street and both lived in West Newton."

"Gardner Asaph Churchill was born at Dorchester, Massachusetts May 26, 1839 and died at Gloucester, Massachusetts August 20, 1896.  He is buried in the Milton Cemetery, Milton, Massachusetts.  He is first listed in the Boston directories in 1858 as a clerk.  He is listed in the 1859-1860 directory as a partner of Loring & Churchill."

Reference:  Smart, Charles E.   The Makers Of Surveying Instruments In America Since 1700  Troy, New York:  Regal Art Press.  1962