Chestnut's sand load

[hausen]

Believe "sand" is a pretty general description of her cargo - it is likely a sand made of some specific mineral not found locally that is used by a nearby industry. I'm fairly sure that Canfornav vessels regularly bring fluorspar / fluorite from Mexico to Windsor, perhaps that's what this was.

[Guest]

Chestnut delivered sand to Windsor. Where did she load this and what was the purpose of shipping it in from overseas?