The British Numismatic Chronicle article on early lead and pewter tokens which was mentioned {by Mitchiner and Skinner} is actually spread over two editions, BNJ53 {1983} and BNJ54 {1984},and is not in the 1984 volume alone. BNJ53 covers the period up to about 1425 and BNJ54 thereafter until the mid-late 17th cent. British lead tokens actually extend up to the early 19th cent but theauthors of the BNJ articles appear to have given up on the later ones, probably because they thought them to anarchic to classify.

I have a newsletter, Leaden Tokens Telegraph {LTT}, which has been going since 2005 and which is available, online and free, at www.leadtokens.org.uk . The purpose is to establishcommunication between metal detectorists and numismatists in this interesting area, to explore the various series and subseries, to float ideas, and to generally show examples and stimulateinterest.

At the moment LTT appears around the first of every odd-numbered month, plus December, and is currently up to edition 118. All back numbers are available from the homepage, which also offers anindex, a bibliography, and an attempted classification system.

The whole range of British lead and pewter token usage is covered, from 13th cent to 19th, and some of the early pieces which you mention appear from time to time in LTT's pages. Some foreignand ancient material is also included from time to time, although not usually with the same level of detail, and there are also frequent articles which look sideways at trying to explore theinterface between lead issues and other better known series, both mainstream and paranumismatic.

To read the earlier E-Sylum article, see:
ENGLAND'S FIRST TRADE TOKENS (http://www.coinbooks.org/v20/esylum_v20n23a22.html)

To read the Leaden Tokens Telegraph , see:
www.leadtokens.org.uk