Complex sentence: He advocated their use in his book "Pillars of Hercules" (1850), which attracted the attention of the Irish physician Dr Richard Barter who introduced them in his system of hydropathy at Blarney, County Cork.
Split into simpler sentences: He advocated their use in his book "Pillars of Hercules" (1850), which attracted the attention of the Irish physician Richard Barter. Baxter introduced them in his system of hydropathy at Blarney, County Cork.