So, we believe Joseph Platt died in 1890 in Cowslip Court, Hulme. In the '91 census, Margaret Platt, widow c1836 Chester with Margaret Ann 1874 Liverpool, Elizabeth 1877 Hulme, Emma 1886 Hulme. Also John William Vernon 1871 Blackley.
In the 1901, Margaret Ann Platt 1842 Stapleford, laundress, Cowslip Court, Margaret Ann Burton 1873 , Liverpool, Emma 1885 Manchester, soap packer (?), Alfred Burton, son in law, 1876 Manchester and two grandchildren named Burton.