One of the very earliest land bank/mutual bank documents is available online: The Key of Wealth: Or, A New Way for Improving of Trade, by William Potter (1650).
Related Articles

Contr'un
Practical explorations of mutual currency and credit
It’s always been a bit of a struggle striking a balance between elaborating general theory — which in the case of anarchist mutualism has often meant tracking down and/or translating the relevant works before commentary […]
Corvus Distribution
Corvine Call #1 Origins and Blazing Stars
“Waiting for a moment until another shellbark dropped, a blue-jay perched upon a bare twig and sang after its fashion. It was a short series of discordant notes; collectively, a harsh, rattling, corvine call, and […]

Anarchism
Socialism in Massachusetts, the Palladium version
You can look at this wiki page for a comparison of the Worcester Palladium and Equality versions of William B. Greene’s essay, “Socialism in Massachusetts,” both from late 1849. MediaWiki’s ability to collate versions should […]