Query: Which two houses were built as student population increased 1845?
Context: The Oppidan Houses are named Godolphin House, Jourdelay's, (both built as such c. 1720), Hawtrey House, Durnford House, (the first two built as such by the Provost and Fellows, 1845, when the school was increasing in numbers and needed more centralised control), The Hopgarden, South Lawn, Waynflete, Evans's, Keate House, Warre House, Villiers House, Common Lane House, Penn House, Walpole House, Cotton Hall, Wotton House, Holland House, Mustians, Angelo's, Manor House, Farrer House, Baldwin's Bec, The Timbralls, and Westbury.