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.
讨
=
寸
+
讠
:
Tecumseh (t) is asking (讨) an advertising column (讠) inside of the aorta (ao3) for a little snack, and indeed, the column ejects some chocolate bars, which causes Tecumseh to thumb up (寸) at it.