Who is A. E. Jonstone from Post Office and what is their importance?

A. E. Jonstone is the superintendent at the Oakford Postal Station. He always wears blood-red shirts, and he has a habit of swiveling importantly in his desk chair. He so obviously a man of cruelty that Henry submits a 30-page report about him, but the civil servant who hears the case insists The Stone, with a 30-year service record, is a fine man. The Stone retaliates by assigning Henry no work, but orders him back when Henry finds easy night work at Prell Station. The Stone kowtows to the public and cares nothing about 40-year veteran G.G. suffering a mental breakdown over the workload. At the end of the novel, Henry learns that The Stone is retiring and refuses an invitation to his going-away party.