Cox family - Lower William Street, St. Johns Wood

Our Great Grandmother Maria Saunders (nee Cox) lived at 26 Lower William Street, St Johns Wood from her birth in 1832 until she left for Australia in 1865.    Her parents were John & Sarah Cox, and John was a Locksmith. All of their family were married or baptised at St. Marylebone Parish Church.   

We are trying to determine whereabouts their home would have been and realise that Lower William Street was changed to Greenberry Street in latter years and it appears that there are only mainly apartments now in this area. However we note there is one old home still standing called ”The Cottage” and wonder if this could have been their home. It appears to be a fairly large home for that era, and know that they would have had to have a fairly large home to accommodate family members visiting from Australia, who had considerable wealth, and sent money home to assist the family left behind in England.    

There is much history on this family, as famous Blue Mountains explorer, and Australian politician W.C. Wentworth and his family often visited the Cox family,  their children were educated in London.

Is there anyone on this site that might be able to assist me?  It would be lovely to know more.   When Sarah’s husband John Cox died, Sarah and her other daughter Annie migrated to Australia in 1865 and settled near Sydney,  they called their home “St. Johns Wood Cottage”