Charles Mason and Jeremiah Dixon were the surveyors who demarcated the Mason-Dixon line between 1763 and 1767. This was done to settle the border issues between British colonies. The agreement to extend the line was made in 1799. The surveyors were Charles Mason and Jeremiah Dixon.
they salied ashore the missippi river
I think you mean Jeremiah Dixon and Charles Mason. The Mason-Dixon Line loosely separated the North from the South prior to and during the Civil War. It was actually a line between two neighbors, Dixon and Mason in the mid-1700's, and their property dispute is now an American legend.
Jeremiah Dixon was born on July 27, 1733.
Charles Mason, Sir George and Jeremiah Dixon traveld through a line which they now call the mason-dixon lien
Charles Mason and Jeremiah Dixon.
Jeremiah Dixon died on January 22, 1779 at the age of 45.
They had to settle a boundary dispute between Maryland and Pennsylvania
Jeremiah Dixon died on January 22, 1779 at the age of 45.
Jeremiah Dixon was born on July 27, 1733 and died on January 22, 1779. Jeremiah Dixon would have been 45 years old at the time of death or 282 years old today.
astronomer & surveyor
The "old line" refers to the Mason-Dixon Line, which was famously surveyed in the late 1760s by Charles Mason and Jeremiah Dixon. The Mason-Dixon Line marks Maryland's northern border with Pennsylvania and its eastern border with Delaware.
Besides becoming the border between Maryland and Pennsylvania, Charles Mason and Jeremiah Dixon's line became what separated the states that allowed slavery (Confederate; south) and the states that didn't (Union; north)