a brief period in the early 1860s Boyden was the sole principal in his office. During this period he retained the Italianate style that he had been working with since the early 1850s. The largest project of this time was the 1862-built Damon Mill at Concord. It is an uncommon example of an industrial structure receiving a full architectural treatment. He also designed, in 1863, the First Congregational Church at Spencer, which was similar in its overwrought design to the First Congregational Church in Keene, built four years earlier. Other works include: 1860 - House for Samuel Dinsmoor Jr., Main St, Keene, New Hampshire E. Boyden & Son, 1863-1898 Circa 1863 Boyden's son, George E. Boyden, became a partner in the office, which became E. Boyden & Son. Though the younger Boyden died in 1885, the firm remained E. Boyden & Son until Elbridge Boyden's death, making it the longest-lasting period in the firm's history. Boyden and his son designed many churches, mainly in the High Victorian Gothic style. The first of these was St. Paul's Church, presently the Cathedral of St. Paul, in Worcester. It is a mostly monochromatic building, but maintains the "stripy bacon" aspect so criticized in such buildings. It was begun in 1868 and completed in 1874. Next was the First M. E. Church in Saratoga Springs, New York, now known as the Universal Preservation Hall. It is considered to be one of the finest High Victorian Gothic buildings in the region. In 1873 Boyden made his first foray into Rhode Island, designing L'Eglise du Precieux Sang in Woonsocket, an American center of French Canadian culture. The church's tower was significantly rebuilt in the early 20th century. In 1874 they designed All Souls Church in Brattleboro, Vermont. This church was the firm's first use of this unique tower, which would be repeated on other churches, including the Congregational Church at Gilbertville (1874) and the Channing Memorial Church at Newport, Rhode Island (1880). Several years later in 1888 he designed St. Paul's in Rutland, Vermont, which attempts to unite the High Victorian Gothic and Queen Anne styles. The firm's next most common type of commission was for academic buildings. In 1867 they competed for the design of Boynton Hall on the campus of the Worcester Polytechnic Institute, but lost to Earle & Fuller. Boyden had to settle for the schools second building, Washburn Shops. Built in 1868,