>> Where can I find a copy of the signing key, so I can verify the source
>> distribution I've downloaded?

>Download the latest gnu-keyring.gpg from
>https://ftp.gnu.org/gnu/gnu-keyring.gpg, then type:
>
>   gpg --import gnu-keyring.gpg
>
>Then try verifying the signature again.

That was exactly what I needed -- thanks so much!

Steve