Cougar,
Thank you for trying. Your help is greatly appreciated. 21 Green Street is the address given on the baptism records in the Parish of St. Mary Spittal, Middlesex, Dec. 9, 1846. Perhaps they had moved by 1851. John was listed as a Tailor. I have no other record for this family until the marriage of son Frederick William Brock in 1862. He married Isabella Sheppard in the District Parish Church, St. John the Baptist, Hoxton, Middlesex.
I'm slowly learning to navigate this site and found clicking on the world produced your web address. What a beautiful site, your family tree is lovely. Thanks again, Dorothy