Archaeologists believe that a massive grave in a vicarage garden in Derbyshire may be the last resting place of a vast army of thousands of warriors that invaded Britain in the ninth century. Archaeologists believe that a massive grave in a vicarage garden in Derbyshire may be the last resting place of a vast army of thousands of warriors that invaded Britain in the ninth century. Archaeologists believe that a massive grave in a vicarage garden in Derbyshire may be the last resting place of a vast army of thousands of warriors that invaded Britain in the ninth century. Archaeologists believe that a massive grave in a vicarage garden in Derbyshire may be the last resting place of a vast army of thousands of warriors that invaded Britain in the ninth century.