Comment by 23skidoo:
Added a cover scan. The copy I indexed is from a university library and appears to be a library rebinding, but unusually while most rebindings have blank covers, this one actually has a pasted-on cover design element (a spine one too). Not sure if this is from perhaps the original dust jacket (I don't know if they had such things in 1921). Scanned anyway. If someone by some weird chance has a copy of this book maybe they can confirm.