Lincoln's blood and his death certificate

[L Verge]

I understand preserving Lincoln's brain, especially if the path of the bullet could be traced for use during the trial of the conspirators. But, what was the point of preserving his blood? Just as a sacred relic?

There are also reports from the Northern Neck that Jones's little rowboat never left Virginia. If it did (and was intact), that would be a pretty large accession to "lose."