Grid filled, message decoded, letter changed, but can't see where the first word of the location is; doesn't matter as we're not required to highlight it, but it's bugging me. Which cell has first letter, please?
I have all but finished this, with historic message, means of transmission, quarry’s description and 6 letters of culprit’s name worked out, but need a hint for the ‘earth with extermination …’ clue. Any help would be appreciated, thanks.