One cannot of course state anything like the above with any authority - I do not intend to try. What I can do is interpret ancient writings and maps with viable conceptions for the present day reader. That the area around Monikie was important to Agricola is self-evident to the Military Mind. Also evident is the importance of the Tay Estuary and the coastline to Montrose and the North Esk at that time. As there is some doubt about the battles whereabouts anyway, my money would be North of this area somewhere, given all the above and the data.
Questions regarding the above and indeed viable comments are welcome.
One Inch Mapping dated 1907. Link to the main Hynd Castle webpage with map, photographs and other articles.