This page offers a guide on where to locate and how to complete Green Children of Anglia, which is a Mystery located in East Anglia.
Follow the Green Footsteps
This Mystery is available immediately you’ve completed Cedd’s Stone. Once you’ve given the silver at the offering altar you’ll be able to follow a set of green footprints that head north along a path. If you lose sight of the green footprints, use Odin’s Sight to highlight the footprints again.
After a short while, you’ll reach a small camp where you’ll find the children who stole the silver you offered at Cedd’s Stone. They’ll then signal for you to follow them up onto the wooden platform. When you speak to them, you’ll discover that they are parentless and fending for themselves. They will return to you the 200 Silver that you offered at the altar, and you’ll then have the option to either give them 65 Silver or share some of your food with them. Or alternatively, you can give them nothing (though that’s not very nice!). Giving them food or silver yields the same outcome, so you can pick whichever choice you prefer. They will give you a necklace called the St. Martin’s Seal and it will mark you as their ally.