1. Ralph married Roger's sister Emma
2. They recruited Waltheof at a wedding feast
3. William was in Normandy, Lanfranc in charge of England
4. Rebels did not get widespread Anglo-Saxon support
5. Danish fleet arrived too late
6. Waltheof sold out the rebels to Lanfranc
7. Lanfranc excommunicated Roger
8. Neighbouring earls stopped the rebels leaving
9. Danes raided York then returned home