Complex sentence: After two years' imprisonment he was released through the kindness of friends who paid his debts, and in April 1755 he was appointed Norfolk Herald Extraordinary and then Norroy King of Arms by the Duke of Norfolk.
Split into simpler sentences: After two years' imprisonment he was released through the kindness of friends who paid his debts. In April 1755, he was appointed Norfolk Herald Extraordinary and then Norroy King of Arms by the Duke of Norfolk.