The age of revolution is the period whereby a number of significant revolutionary movments occured in many European and American Parts
Answer:
This letter, my very dear Eliza, will not be delivered to you, unless I shall first have terminated my earthly career; to begin, as I humbly hope from redeeming grace and divine mercy, a happy immortality.
He’s trying to say that it would be almost impossible to continue their journey without having an important part of his mind outwards and shared with the world