Hi Adrian,
I have searched using the free search facility at scotlandspeople and by inputting the following info for the 1891 census you might narrow down the search to get your elizabeth little and daughter mary.
Firstly put
Little in surname box
Elizabeth in forename box
Select Female option
Age range 26 28
Dumfries
all parishes
You get 1 match (if its not her, she probably married)
For mary (her daughter)
Follow same guide above and put age range 4 - 5
You'll get 2 matches
Do Elizabeth first and see if she has a mary aged 4 or 5 with her.
It is of course possible Elizabeth and Mary moved out with the County of Dumfries, which will make tracing them much more difficult.
The Kirk Session records are kept at the NAS in Scotland. These records may provide you information for father's name and the baptisms details.
In the meantime, you may wish to try a narrowed search for a wedding for elizabeth little on scotlandspeople webiste.
Select Marriages 1855-1930
Leave male boxes blank
input Little and
Elizabeth in the respective female boxes
then narrow years to 1880 (when she would have been 16) 1900 (when would have been 36)
Select Dumfries
By doing the above, you will see 15 results, 4 of which refer to marriages in canonbie. In thos edays it was common practice for marriages to be held in the brides' home parish. Is your Elizabeth one of these 4 listed records?
The above searches willl probably use up the 30 credits. I hope it helps you find your Elizabeth and Mary.
Best wishes,
Kojak