Don,
Thanks for the kind words. However, I am not your BOY
It is because folks in cold regions might consider getting into casting that they should take into consideration the fumes produced from this hobby. I did not see that mentioned in the thread prior to my post.
While casting virgin lead does not release fumes by itself, certainly many of the various fluxing elements do release toxic fumes.
For the folks that might be recycling lead from various sources, there are many unknown items that will also create fumes as they are smelted into ingots. For example smelting hardened lead can release arsenic.
Since novalty has already recommended Glen's book, the issue of casting fumes as a danger is also mentioned there