Complex sentence: This did not seem to have stirred his enthusiasm for the seaman's profession; he gave himself six months' rest from the sea, socializing and spending in excess of the generous allowance that he received from his uncle.
Split into simpler sentences: This did not seem to have stirred his enthusiasm for the seaman's profession. He gave himself six months' rest from the sea, socializing and spending in excess of the generous allowance that he received from his uncle.