From California
Fort Kearney,May 21.--The California, Pony Express, with dates to the 11th instant has arrived. The steamer of the 10th sailed with $440,000 in treasure.The Union demonstration at San Francisco on the 11th instant was an astonishing success. Nothing like it has ever been seen in that city before.
Business was totally suspended and the whole population appeared in the streets.--Union flags were as plenty as stacks of grain in a wheat field. There were three stands for speakers. Senators Latham and McDougal, Gen. Sumner, Gen. Shields and others spoke. The spirit of the addresses and resolutions was that the Administration must be sustained and put down secession and preserve the Union. A procession, composed of thousands of citizens, including all the military and civic organizations, constituted a part of the display. All political parties joined in the demonstration.
A Union meeting was also to be held at Portland, Oregon.
