A Bird stump is a variety of vase

Vase

The vase is an open container, often used to hold cut flowers. It can be made from a number of materials including ceramics and glass. The vase is often decorated and thus used to extend the beauty of its contents....

 popular in 1920s England

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

. It was generally made of porcelain in the shape of a tree stump, with a bird for decoration. Stumps of branches on the side of the tree formed the openings into which the stems of flowers might be inserted.

A bird stump plays a role as the MacGuffin

MacGuffin

A MacGuffin is "a plot element that catches the viewers' attention or drives the plot of a work of fiction". The defining aspect of a MacGuffin is that the major players in the story are willing to do and sacrifice almost anything to obtain it, regardless of what the MacGuffin actually is...

 in Connie Willis

Connie Willis

Constance Elaine Trimmer Willis is an American science fiction writer. She has won eleven Hugo Awards and seven Nebula Awards. Willis most recently won a Hugo Award for Blackout/All Clear...

's 1997 time travel

Time travel

Time travel is the concept of moving between different points in time in a manner analogous to moving between different points in space. Time travel could hypothetically involve moving backward in time to a moment earlier than the starting point, or forward to the future of that point without the...

 science fiction novel To Say Nothing of the Dog

To Say Nothing of the Dog

To Say Nothing of the Dog: How We Found the Bishop's Bird Stump at Last is a 1997 comic science fiction novel by Connie Willis. It takes place in the same universe of time-traveling historians she explored in her story Fire Watch and novel Doomsday Book.To Say Nothing of the Dog won both the Hugo...

: How We Found the Bishop's Bird Stump at Last.