Complex sentence: On 8 May Florence Maybrick wrote a compromising letter to Brierley, which was intercepted by Alice Yapp, the nanny, who passed it along to James Maybrick's brother, Edwin, who was staying at Battlecrease.
Split into simpler sentences: On 8 May Florence Maybrick wrote a compromising letter to Brierley, which was intercepted by Alice Yapp, the nanny. Yapp passed it to James Maybrick's brother, Edwin, who was staying at Battlecrease.