Personally I find anything that lists peoples names interesting. There are not only the census and Parish registers which enable researchers to find their ancestors, items like Poll Books are useful too!
The 1832 Reform Act allowed landowners, tenant farmers, shopkeepers and householders who paid £10 or more annual rent to vote, but not women!
The Poll Book shows the name of the candidates Cavendish, Gisborne and Sitwell and who each person voted for
Many of the names are familiar Whittington names (especially if you wander round Whittington churchyard regularly like me!).