the Octagon

A building on the island, once a fiddler's retreat, on whose roof Filmer and Bertie are treed.

Scenes it is in

1. Bertie rows to the island, is chased up the Octagon by a nesting swan to sit beside Filmer in the rain, until Jeeves disposes of the swan; Filmer then concludes Thomas set his boat adrift.Chapter 1, the island