Here’s an eastbound version of SP&S’ along-the-way brochure. At least, the segment from Portland to Spokane is listed in an eastbound direction; the segment from Portland to Seaside is still listed westbound. Where the previous brochures mentioned the Cascade Rapids on the Columbia River, this one describes Bonneville Dam, whose construction commenced in 1934 and was still incomplete when this brochure was issued.
Another difference from the earlier airplane maps is that this one as less color, perhaps a concession to the Depression. While the maps in the 1928 and 1931 editions showed green and yellow as well as blue and red, this one just has blue and red.