Lost positives

[Paul McFedries]

A correspondent asked me if I knew where he could find a list of lost
postives (such as gruntled, kempt, and sheveled). Since (if I understand the
term correctly) you can just make up any old lost positive by chopping off
an existing word's negative prefix, then a complete list would be silly.
However, what about a list of lost positives that were once actual members
of the lexicon (such as kempt)? Does anyone know of any books or other
resources that have such a list?

Thanks.

Paul
http://www.mcfedries.com/
http://www.logophilia.com/