Unfortunately the 1881 census form is very faded. They are at 9 Little Gray’s Inn Rd, Holborn.
The children seem to be Annie 12, Alice 8, Annette 2 and William J, 1mo.
RG11/341/8/10.
Presumably this is a 2nd marriage* for William J Sewell snr (40, marble polisher). His wife Annie is 28.
*Now confirmed he was a widower when he married Ann Grainger at St Philip’s, Clerkenwell, 9 June 1878.