Nine years after the Columbia River Historical Expedition, the SP&S was still reminding people of it in this brochure. Page 2 includes a photo of the Wishram monument while page 7 has a photo of the Astor Column.
The brochure mentions, but doesn’t include a photo of, the Lewis & Clark salt works. It does, however, show Ben Holladay’s Seaside Hotel. Round-trip fares from Portland to Seaside started at $3.50, which sounds inexpensive, but that’s close to $50 in today’s money.