Not finding anything for Alice - how do we know she was her sister - because her father had the same name/occupation?
I can't see her on a census or family trees with the same family but I could be missing something.
I am so glad you have posted that Milliepede
I have been on Familysearch for 30 mins - and the Worth and Sandwich Burbridge families look different to me
Although both parents are Richard and Mary - the Sandwich baptisms ALL state Mary A Burbridge
so - I came to the conclusion that Alice Ebenezer Burbridge and Miriam Burbridge may be cousins and not sisters ??
we need them together in 1861 census ...be back soon
Dee - was the Miriam you found in the workhouse aged 20

...because yours was born 1852 .
if that workhouse Miriam Birbridge is not 20 - she is not your Mary ??
ADDED
1861 Census
mother Mary
https://familysearch.org/pal:/MM9.1.1/M75B-WK6Miriam
https://familysearch.org/pal:/MM9.1.1/M75B-WKXa sister Mary born in Wood, Kent in 1857
https://familysearch.org/pal:/MM9.1.1/M75B-WKFno Richard - probably working away from home laying railway track
but more to the point - no Alice Ebenezer Burbridge ??