In 1845 Ann Foulston married John Hayter in Paddington. Her father was Charles Hayter smith [not marked as deceased but that doesn't mean he hadn't died]. She stated she was living in Market Street. Witnesses were Charles Trowsdale & Eleanor Trowsdale [my 3 x g grandparents]. Eleanor had been living at Market Street when she married in 1838, father Charles a blacksmith so I am confidently assuming Ann & Eleanor were sisters.
I have just received a death certificate of Charles Hayter locksmith & bell hanger died 23 Nov 1839 at 40 Percy Street Marylebone. Informant was Ann Foulston [no relationship given

] of 72 Drummond Street.
I have looked for Ann in Market Street & Drummond Street in 1841 with no success. Unfortunately the writing on the census sheet scans is very faint for both streets [worst for Market Street].
I had earlier found a Charles Hayter locksmith in Robson's 1839 Trade Directory at 4 David Street Marylebone & in an 1845 directory the same or another Charles Hayter locksmith at 12a Great Chesterfield Street. This however could be Eleanor's brother Charles born 1813.
SO ..can anyone please help me find Ann Foulston in 1841? And - is it likely the 1839 death was her father? Can her first marriage to a Foulston be found? Please?
Thank you , Josey
ADDED: Charles Hayter was buried on 1 Dec 1839 in Whitefield's Memorial Church, Tottenham Court Road which was taken down and re-erected in 1890; this new building was totally destroyed by bombing on Palm Sunday 23 Mar 1945 by the last V2 to fall on London.