Born in Salisbury, Massachusetts, Morrill graduated from Bowdoin College in 1834 and read law to enter the bar in 1836.

[2] Morrill sold the property to Caleb Ragin and his wife Sarah on March 20, 1855.

[2] He was a justice of the Texas Supreme Court from 1868 to 1870, returning to private practice in Austin from 1870 to 1872.

Morrill was confirmed by the United States Senate on February 5, 1872, and received his commission the same day.

[1] After his retirement, Morill remained in private practice in Austin until he died there on March 5, 1884.