Among those on his right was Bob, the guy that had days earlier started the lease and so began the first...
OR
Among those on his right was Bob, the guy that had days earlier started the lease and so begun the first...
OR
Among those on his right was Bob, the guy that had days earlier started the lease and so had begun the first...
The question really is, when the conjunction and lists two things that happened in the "perfect past", do I need a second had?
In this situation, the past is: Bob was on the right; while the "perfect past" or further past is: Bob was the guy that started the lease and (in so doing) began the first... (fill in the blank).
Which is right, or best? What is the rule?