after working at poole bros. for 12 years, george amos poole, jr. was made the vice president in 1903. after the death of his father, george amos poole, sr. in 1918, he subsequently became the new president of pool brothers. while at the firm, he helped to build up the company to become one of the three most important in chicago and one of the largest printers in the nation. poole bros. primarily printed maps and railway tickets.