In 1857, Richmond attorneys Roscoe B. Heath (1827-1863) and John M. Patton Jr. devised and published a General Index to Grattan's Reports.

[6] In June, 1857, Grattan traveled to Cleveland, Ohio to deliver a speech favoring slavery (and denouncing abolitionism preached from the pulpit) to an assembly of the Presbyterian Church.

[7] During the 1860 federal census, Grattan owned $10,000 in real estate and $3,000 in personal property, which according to the accompanying slave schedule included two female mulattoes (one a child) and a 19 year old black man.

[8] During the American Civil War, his eldest son (James F. Grattan), enlisted as a private with the Williams Rifles (1st Virginia Infantry) on April 19, 1861, was promoted to full Corporal on September 2, 1862, and mustered out on October 28, 1862, probably on account of his younger brother George's death during the Battle of Seven Pines on June 1, 1862, just months after his enlistment in the 12th Virginia Infantry.

[9] Thus Grattan served alongside T. J. Evans and N. M. Lee, the younger Littleton Tazewell having died before the session began.

[10] The Southern Historical Collection at the University of North Carolina at Chapel Hill has two of his letters to his wife during travels to Philadelphia, Pennsylvania and Lewisburg (then in Virginia).