Definition of "wunner"

In fact I wos napped on the nod, But the way I got woke wos a wunner.

1890, Various, Punch Among the Planets‎

Our folks are slow to fratch, but they're not quick at letting go," said Tom, who paused and added: "I wunner where Bell got his money; he had none when he took a job at mill in oad Osborn's time."

1918, Harold Bindloss, The Buccaneer Farmer‎