Upon his return to Linz, he phoned the Israeli consul in Vienna and followed up by sending him a package that contained the contents of the baron’s letter, a biography of Eichmann, examples of his handwriting, the photograph, and a chronicle of the eight-year search for him

What does "followed up" and "chronicle" mean in this context?

Question

Upon his return to Linz, he phoned the Israeli consul in Vienna and followed up by sending him a package that contained the contents of the baron’s letter, a biography of Eichmann, examples of his handwriting, the photograph, and a chronicle of the eight-year search for him

What does "followed up" and "chronicle" mean in this context?

Answer

In this example I would say this means:

Follow-up - he did something further, he phoned them then he sent a package. It is a second action to the first one

A chronicle- is the report or the account of the 8-year search

Answer

“Follow up” means to continue doing something.
“Chronicle” means a written record of events in the order in which they happened.

Answer

I would classify that sentence as a run on.   And would break it up into a couple of single sentences versus one with multiple comas to connect everything together.   If you have to catch your breath to complete a sentence, it's possibly a run-on and too long.