Edith was aged 4 months in 1881 census, here is her birth:
Oct/Nov/Dec 1880
Tonbridge ref 2a 608
Edith Alice Bashford
Augusta's birth I gave you before, Oct/Nov/Dec 1882
then there is:
Jul/Aug/Sep 1884
Tonbridge ref 2a 641
William James Bashford
There are other Bashfords around in this reg district around these dates, so you will need certs to prove that Edith, Augusta and William are from the same family.