Complex sentence: In 1895 the Astrologer's Magazine quoted Cross for his support of the idea of forming an astrological society, which proved a popular concept; on 14 January 1896 Alan Leo founded a society with himself as the first president and Cross as vice-president.
Split into simpler sentences: In 1895 the Astrologer's Magazine quoted Cross for his support of the idea of forming an astrological society. On 14 January 1896 Alan Leo founded a society with himself as the first president and Cross as vice-president.