Analysis of information sources in references of the Wikipedia article "Cotton library" in English language version.
Strype thus mentions Cotton House: "In the passage out of Westminster Hall into Old Palace Yard, a little beyond the stairs going up to St. Stephen's Chapel, now the Parliament House" (that is, the present House of Commons), "is the house belonging to the ancient and noble family of the Cottons, wherein is kept a most inestimable library of manuscript volumes found both at home and abroad." Sir Christopher Wren describes the house in his time as in "a very ruinous condition."