Such excitement! Opening on June 1, 1909, the Alaska–Yukon–Pacific Exposition was a world's fair hosted by Seattle to publicize the development of the Pacific Northwest, including Canada, Alaska, as well as countries of the Pacific rim. In Miss Lillian's postcard collection are 24 official postcards from the A-Y-P, sporting its official seal. Since personal cameras were a rare thing in those days, the purchase of official postcards was the best thing to commemorate a special outing.
I can image Lillian taking the trolley to the fairgrounds, which were located on the campus of the University of Washington. This was such a huge event, with so many special events scheduled throughout the summer and so many fabulous things to see. I wouldn't be surprised if she went several times over the course of the fair, which closed on October 12.
A series of official postcards featured scenic sights of Washington state and Alaska.