February 12, 1855.

March 27, 1927.

Worcester Rural Cemetery, Worcester, Massachusetts.

In his earlier years, Sleeper was a missionary to Bulgaria. He was later, for 19 years, pastor of the Congregational church in Wellesley, Massachusetts, and subsequently a worker in the Massachusetts Missionary Society. As of 1923, he was pastor at the Maverick Church in East Boston, Massachusetts. Sleeper’s works include:

  1. Petitio