found this entry could it be your family?
1911 , No.7 Thimblemill Lane, Aston
William G Harris age 49 , b Birmingham Tube worker.
Rose Harris age 29 b Birmingham
Rose Harris age 9 b Birmingham (believe this is Rose Ellen Stanfield , Dec 1901)
George Harris age 4
Joseph Harris age 1.
Where William puts the age details he has written in the female column first and it looks like 50
then he crosses it out and puts ?9 in the correct column(can't make it out) and then underneath 49.
Although he puts William G when he signs the entry at the end it looks like William J.