Every body is busily engaged in making preparations to meet the anticipated flood. Merchants and shopkeepers, and all having property on the ground floor, are raising them above high water mark--boats are moored at the doors--vehicles of every description, stock, grain, tents, hay, provisions and people, are crowded together on the public square, and every available dry nook and corner is occupied. The Marysville Express of the 20th, says: "The water is within three or four inches as high as it was at the last flood, when it was 6½ inches higher than ever known before. The rain is still falling heavily, and when we consider the enormous, almost frightful, quantity of snow in the mountains, the most alarming fears may most reasonably be entertained. All seem to join in the belief that the present will exceed any previous flood known." The accounts we receive from the mining districts are really heart rending; death by cold and starvation has visited many poor unfortunates, while as yet the tale of horrors is but half told. It was feared that as intelligence should be received from the mountains, we shall have to record the sad fate of many more. Great quantities of gold are still obtained in California. The average value of the gold dust brought by each steamer of the Panama line is about $500,000. This is an astonishing production; and we are almost ready to believe the enthusiastic declarations of the first adventurers in this El Dorado, that the gold region is inexhaustible. Emigration to California continues to be extensive. Most of those who intend to become permanent settlers proceed by the overland route, from Independence, Missouri, to Sacramento City. Late in the summer of every year, a relief train is sent from the settled portion of California, to meet the emigrants. Many persons are thus saved from death by starvation. The expense of the relief train is a consideration of little importance, when its object is borne in mind. Had the same measure been adopted soon after the gold discovery, many of those whose bones are bleaching on the plains, would have survived to become useful citizens of California.