Robin's Lost Axe: you can find it near Marnie's ranch.
From the ranch head south and cross the two bridges here:
Once you have crossed the bridge, follow the eastern wall and you will find the axe.
Mayor's "Short's" : In Marnie's bedroom
Blueberry Basket: Go to the bus and take a left, following the road into the next screen. The basket will be next to the tunnel entrance on the top side of the road.