Howbery Park is a 36-ha park located adjacent to the River Thames in Crowmarsh Gifford near Wallingford, UK. Its main feature is an English manor house built in about 1850 by English Member of Parliament (MP) William Seymour Blackstone. Blackstone fell into debt, largely because of the costs of building this new home, and spent time in the debtors prison at Oxford. His debt problems also contributed to the end of his political career.