The threatened invasion had brought two of the biggest Mahratta rulers into an alliance that now gathered its forces to repel the British, and those rulers had promised the thieves a king's ransom in gold for the cartridges, but one of the thieves who had helped break into the Madras armoury had refused to let his brother join the band and share in the profit, and so the aggrieved brother had betrayed the thieves to the Company's spies and, two weeks later, the caravan carrying the cartridges across India had been ambushed by sepoys not far from Chasalgaon?