Complex sentence: Clark assumed the abdominal growth was pregnancy, and met with Hastings twice a week from 10 January to 16 February; as Hastings was unmarried, his suspicions were hushed up.
Split into simpler sentences: Clark assumed the abdominal growth was pregnancy, and met with Hastings twice a week from 10 January to 16 February. As Hastings was unmarried, his suspicions were hushed up.