Show gigantic sign board 11 arrangements are being made for the celebration of the anniversary of the discovery of san francisco bay in 1769 by portola and for the purpose of advertising this event there has been constructed on yerba buena island B san francisco bay what Is probably the largest sign ever erected the sign which hasi has been cut on the sloping hills of the island to Is 1300 feet long by feet high the words Por portola festival october 1923 19 23 are arranged in two lines each letter of which occupies a space 45 feet by 45 feet the outline of the otters being eight feet in width the work was i done by digging trenches s eight inches in depth and filling them with lime which shows up clear and white against the green of the aill ilde |