Premise: Hardwick House is a Tudor-style house on the banks of the River Thames on a slight rise at Whitchurch-on-Thames in the English county of Oxfordshire. It is reputed to have been the inspiration for E. H. Shepard's illustrations of Toad Hall in the book "The Wind in the Willows" by Kenneth Grahame, although this is also claimed by Mapledurham House, Fowey Hall Hotel, Foxwarren Park and Fawley Court.
Hypothesis: Hardwick House has a steeply-pitched gable roof.