Mary Miranda Dickson Morrill (1826-1906) daughter of Joseph Dickson and Sally Lattimer wife of Amos Morrill (1809-1894) son of Abraham Morrill (1776-1862) and Mary "Polly" Bagley (1778-1847) born in Salisbury, Massachusetts.
Morrill graduated Bowdoin College in 1834 and began practicing law in Murfreesboro, Tennessee in 1836. He partnered with Miranda's brother, Joseph J. Dickson until he moved to Austin, and formed a partnership with Gov. Andrew J. Hamilton.
On January 18, 1872, Morrill was nominated by President Ulysses Granta United States District Judge of the United States District Court for the Eastern District of Texas.