[1] He was part owner of Pemberton Hall, listed on the National Register of Historic Places in 1971.

[2] Governor Jackson is also known as having attended the ceremonies at Gettysburg Battlefield in Gettysburg, Pennsylvania from the largest military battle on the North American continent in July 1863, dedicating several regimental and battle monuments for engagements participated in by the Union Army (United States Army), and even visiting some already erected and privately funded Confederate States Army monuments, and showing equanimity towards both sides with several regiments of Maryland troops in both armies, including regiments from the former pre-war State Militia.

It was he who sent the first two ships (the "Ark" and the "Dove") to the shores of the Potomac River and the Chesapeake Bay with colonists who first briefly visited Virginia further south, then landed in March 1634, established the new capital St. Mary's City, under his younger brother Leonard Calvert, as the first colonial governor.

By the end of the 19th century, carrying the old colonial armorial bearings from the shield emblazoned on a newly revived state flag, now seemed symbolic of the revival of reconciliation and sense of moving forward in the state so deeply torn asunder during the recent Civil War.

In his 2005 biography of poet Ogden Nash, Douglas M. Parker has written that "Elihu Emory Jackson ... made a sizable fortune in the lumber business."