 There are audio examples available on the British Library website and BBC sources for the older Kentish dialect, and an "Essex Dialect Handbook" has been published; the Essex County Records office has recorded a CD of the sounds of Essex dialect speakers in an effort to preserve the dialect.The Survey of English Dialects investigated 15 sites in Essex, most of which were in the rural north of the county and one of which was on Mersea Island—an unusually high number of sites, being second only to Yorkshire.Many of the first English books to be published were by Kentish writers, and this helped spread Kent dialectal words (e.g.