The Sticks are the only ones mentioned to be involved in the crime. Aunt Fanny - re-christened as Aunt Francis - is not taken sick, she goes to visit a friend, who needs support having broken her leg.
The Sticks are the only ones mentioned in relation to the crime. Aunt Fanny - previously named Aunt Francis - is not unwell; rather, she visits a friend who has needed support after breaking their leg.