Designed by John Nash as part of his plan to develop the Crown lands into the fashionable residential estate of Regent's Park - this house was built c.1825. A prosperous stone merchant and paving contractor, John Mowlem, was the first tenant whose company was to become one of the largest in the country. Other residents included a lady who experienced a strange psychic occurrence at the house in 1856; Sir Guildhaume Myrddin-Evans, chief international labour advisor to the Government; and French horn virtuoso Barry Tuckwell.
Mendelssohn, Dickens, Darwin and Gerald du Maurier all spent periods in neighbouring houses, as well as 'Mrs Aria' - gossip columnist and long-term lover of actor Henry Irving.