Complex sentence: In 1839 his name became more widely known in connection with the famous tournament which took place at Eglinton castle and is said to have cost him £30,000 or £40,000.
Split into simpler sentences: In 1839 his name became more widely known in connection with the Eglinton Tournament. This took place at Eglinton castle and is said to have cost him £30,000 or £40,000.