Sickingen, Franz von, [132];
organises League of Knights, defeat and death, [169].
Sidney, Sir Philip, Governor of Flushing, [366];
death, [370].
Siena, enemy of Florence, [9];
accepts a French garrison, [20];
joins league against Florence, [22];
turns to Emperor,then to France, [244];
regained for Imperialists by Cosimo, Duke of Florence, [250].
Sievershausen, battle of, [245].