Thanks for starting this, Denise. That was a good page you linked to.

Here's a couple I found.

A nice, vintage report on colloidal silver and it's preparation by Carey Lea himself:
http://books.google.com/books?id=K5M...lver#PPA337,M1

And another one from the same era with more details:
http://books.google.com/books?id=zZM...otropic+silver