Keith, with 30,000, he has left on the Weissenberg, to straiten Prag and the Austrian Garrison on that side: our wagon-trains arrive from Leitmeritz on that side, Elbe-boats bring them up to Leitmeritz; very indispensable to guard that side of Prag. Friedrich's fixed purpose also is to beat the Austrians, on the other side of it, and send them packing; but for that, there are steps needful!