Have posted the 1901 just in case you do not have it

-
John Casey 23 b. Kensington, London
Mary Ann Casey 22 b. Islington, London
Annie Casey 9 Months b. Islington, London
Godson Street, Clerkenwel RG13 Piece 251 Folio 51 Page 39
The address ties in with their marriage certificate.
JJ