Seeking the third Ephgrave infant death before 1911

My great-grandparents Frederick and Phoebe Ephgrave state that three of their children have died by the time of the 1911 census.

A search of the BMD entries for Ephgrave children born between their marriage date in 1896 and 1911 (and taking into account the other children's birth dates) suggests some possibilities. One such is the birth of Frederick Charles Ephgrave, registered in December 1905, listed immediately after that of Alice Maud Ephgrave, who was born 1 November 1905.  Could Frederick have been Alice's twin? 

Frederick and Phoebe's first son was called Frederick W J, who died aged 7 months in 1901. 

I haven't found a death entry for Frederick Charles between 1905 and 1911 though, so this may be another member of the extended Ephgrave family simply registered on the same day. Further searching to be done.