If you follow the instructions at the beginning, in Lost Cousins, you will be advised where to find all the censuses which can be used on the site.
Originally when it first began, I seem to remember using Family Search, where the 1881 census is free.
If you get into the site fully, the page where you put your entries has a space for piece,folio and page numbers.
The newsletters are always very useful and informative.
Kooky