Analysis of information sources in references of the Wikipedia article "Bull's Head, Strand-on-the-Green" in English language version.
The interior is a warren of drinking areas on various levels, with the lowest, the "Duck & Grouse" serving as a restaurant. Used by Oliver Cromwell as a secret HQ during the civil war until he was betrayed to royalist forces and had to make his escape via a tunnel to what is now Olivers Eyot, an island in the Thames. His sister, the Countess of Fauconberg, lived nearby.
