Day Jobs of Famous Authors

I am curious if anyone has knowledge of what type of work various authors throughout history were employed in.

There were authors who were wealthy and did not have to work to survive, and authors who were eventually paid to write, and so quit other jobs as a means of making a living.

What are famous examples of authors who had interesting Day Jobs or jobs early in their career? How did these roles impact their work, their time to write, their experiences in writing?

I'm looking for historical authors as well as recent ones.

An example:

Douglas Adams worked as a body guard for a Qatari Oil Tycoon