In 1798, Opponents made accusations of espionage against Shneur Zalman of Liadi, and he was imprisoned by the Russian government for two months. Excoriatory polemics were printed and anathemas declared in the entire region. But Elijah's death in 1797 denied the "Misnagdim" their powerful leader. In 1804, Alexander I of Russia allowed independent prayer groups to operate, the chief vessel through which the movement spread from town to town. The failure to eradicate Hasidism, which acquired a clear self-identity in the struggle and greatly expanded throughout it, convinced its adversaries to adopt a more passive method of resistance, as exemplified by Chaim of Volozhin. The growing conservatism of the new movement – which at some occasions drew close to Kabbalah-based antinomian phraseology, as did the Sabbateans, but never crossed the threshold and remained thoroughly observant – and the rise of common enemies slowly brought a rapprochement, and by the second half of the 19th century, both sides basically considered each other legitimate.