Question

The Importance of Being Earnest?

1. What leads Algernon to suspect that Ernest/Jack is a Bunburyist?

Algernon finds a handkerchief embroidered “Jack Worthing” in his friend’s jacket pocket.
Gwendolen tells him that his name is really Jack.
He overhears him call himself Jack to a friend.
He sees an inscription on a cigarette case.