Complex sentence: The primary responsibility of the Controller was to check and control the Keeper/Treasurer's expenditure by keeping a counter roll of the Wardrobe accounts; he went on to have responsibility for checking financial compliance and quality control across various departments of the Household.
Split into simpler sentences: The primary responsibility of the Controller was to check and control the Keeper/Treasurer's expenditure by keeping a counter roll of the Wardrobe accounts. He went on to have responsibility for checking financial compliance and quality control across various departments of the Household.