Early immigration included St. Augustine in 1565, Jamestown, Virginia in 1607 and Plymouth, Massachusetts in 1620.
Every cemetery has their own rules; follow them.
Use a Correspondence Log for both regular and electronic correspondence. This includes the name and address of the person to whom you have written, what you requested, the date the request was sent, and a column for the outcome. Remembering every letter written is impossible. Follow up if you don't get an answer within a month.
[Sources & Evidence]
Names for causes of death have changed over time. Try to match the old name with the current medical name.
DNA Sequencing is a laboratory technique used to determine the exact sequence of bases (A,C,G and T) in a DNA molecule. The technology of DNA sequencing was made faster and less expensive as a part of the Human Genome Project.