Unpublished manuscript, on the quadrature of the circle by Mark Roworth Roworth provides his attempt to solve the problem of the quadrature of the circle using an equation for the segment of 90 degrees. He includes a diagram illustrating this method. Further diagrams relating to this paper are found at AP/12/22/3. Subject: Mathematics Written by Roworth in Patna, Bahar [Bihar, India]. 5 April 1825