Complex sentence: During 1824, Ainsworth set about producing his own magazine, "The Boeotian", which was first published on 20 March but ended after its sixth issue on 24 April.
Split into simpler sentences: During 1824, Ainsworth set about starting his own magazine, which became "The Boeotian" and was first published on 20 March. However, the magazine ended after its sixth issue on 24 April.