吞声

吞 = 口 + 天 : Tommy Turtle (tu) tried to swallow (吞) a whole mandarin (口) in front of the encampment ((e)n1) and is about to suffocate. Fortunately an angel (天) sees him struggling and rescues him.

声 = 士 + 尸 + 丨 : Sherlock Holmes (sh) hears the terrifying sound (声) of bone (丨) on stone in front of the engine ((e)ng1), and he's sure that there must be a ghost (尸). Indeed it's only the bachelor (士) who wants to scare Sherlock.