Many Anglo-Saxon people needed to learn Norman French to communicate with their rulers, but it is clear that among themselves they kept speaking Old English, which meant that England was in an interesting tri-lingual situation: Anglo-Saxon for the common people, Latin for the Church, and Norman French for the administrators, the nobility, and the law courts. In this time, and because of the cultural shock of the Conquest, Anglo-Saxon began to change very rapidly, and by 1200 or so, it was no longer Anglo-Saxon English, but what scholars call early Middle English. But this language had deep roots in Anglo-Saxon, which was being spoken much later than 1066. Research has shown that a form of Anglo-Saxon was still being spoken, and not merely among uneducated peasants, into the thirteenth century in the West Midlands. This was J.R.R. Tolkien's major scholarly discovery when he studied a group of texts written in early Middle English called the Katherine Group, because they include the Life of St. Katherine (also, the Life of St. Margaret, the Life and the Passion of St. Juliana, Ancrene Wisse, and Hali Meithhad—these last two teaching how to be a good anchoress and arguing for the goodness of virginity). Tolkien noticed that a subtle distinction preserved in these texts indicated that Old English had continued to be spoken far longer than anyone had supposed.