..\Documents\My Games\GC3Crusade\Saves was the location/origin of the file whose link I posted to Google.
Perhaps these are the save files as produced by the OPT IN BETA galciv3 that I am running ???
As further data I note that the timestamps on these files change to the current time whenever I save my game using the same filename e.g. HS9-3.1 ( Hex Sigma 9 (race name) - Game 3 Move 1)
I am running not only the Crusades DLC but the Retribution DLC as well.
..\Documents\My Games\GalCiv3\Saves contains only a single file "steam_autocloud.vdf"