Past perfect

The following is an extract from a memoir:

From inside the small room of XX jail, I looked at the sky. I thought of Mr Y then. Of how I came to be acquainted with him. How I had become intimate with him. How he taught me the essentials of political life and how I came to earn his love.

The man, certainly a political figure, was reminiscing his days in the past. My question is: shouldn’t he have used past perfect form all thorough the sentences after “I thought of Mr. Y then.”? Let me rewrite it below:

From inside the small room of XX jail, I looked at the sky. I thought of Mr Y then. Of how I had come to be acquainted with him. How I had become intimate with him. How he had taught me the essentials of political life and how I had come to earn his love.

Another question – the man has used incomplete sentences as a style. I am quite acquainted with such a style of writing, but is it permitted to leave out “of” in every other incomplete sentences after its use in the first sentence?