Apparently, according to WorldCat, I’d have to travel overseas to other libraries to read it. And it was published in 1909, so presumably its copyright has long since expired. If travel ever resumes, I think I’ll make vacation plans to visit one of these libraries and scan the book myself...
Regarding sources for Wikipedia on Dr Thomas Baty, one of the longest freely published accounts I found online is at http://www.ilajapan.org/doc/baty_e.pdf - relevant as Baty spent much of his life in Japan.