sound / voice / tone / noise / reputation / classifier for sounds
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.
to ask / to invite / please (do sth) / to treat (to a meal etc) / to request
请
=
讠
+
青
:
The Queen of Hearts set up a fountain of youth right in the middle of the engine. She invites everyone to take a sip and even set up an advertising column to motivate the visitors to come and try it.