The Adventure of the Dying Detective

Dr Watson is called to Holmes' sickbed, who is suffering from a highly infection tropical disease contracted whilst he was working on one of his cases. Yet when Watson arrives Holmes will not him help. Instead, he has him wait around until finally sending him on a peculiar errand. Watson must fetch a Mr Culverton Smith and ask him to come back to 221B Baker Street. But Watson is to return before Smith and hide.
"The Adventure of the Dying Detective" is part of "His Last Bow".