Complex sentence: While Lang is away in Washington, the writer finds items in McAra's room that suggest he might have stumbled across a dark secret, among them an envelope containing photographs and a phone number the writer discovers is Rycart's.
Split into simpler sentences: While Lang is in Washington, the writer finds items in McAra's room suggesting he might have stumbled across a dark secret. Among them is an envelope containing photographs and a phone number the writer discovers is Rycart's.