On Sat, 21 Apr 2018 11:27:48 -0500, dpb wrote:

On 4/21/2018 8:30 AM, pedro wrote:
...

Oh for the times past when a MS MVP would pop in with a solution.

Anybody?

<https://support.office.com/en-us/article/find-links-external-references-in-a-workbook-fcbf4576-3aab-4029-ba25-54313a532ff1

Wonderful! Found it like a shot. (Of course, WHY it was there remains
a mystery, but at least the ghost has been dealt with).

Thanks for that link - all my hunting for a solution hadn't discovered
that, and doing a search of the entire file looking for the linked
file name with a search tool was frustrated by the workbook being
encoded of course.

Many thanks.