The library consists of a collection of indexes for censuses taken in England in the nineteenth century. Most of the indexes are for the 1851 census. However, as interested groups complete 1851, they move on to later years, notably 1871 and 1891. Some counties are complete for 1851, others not. Hertfordshire and Herefordshire are two counties where there is a very limited amount of material published.
Indexes vary in the information they detail.
Some give names, no initials, and folio numbers only. Others will detail surname, given name, age and sometimes, occupation. Generally up to four booklets can be sent at a time. However, this varies according to the size of the books.