404. That’s an error.
The requested URL /bookmarks/mark?op=add&bkmk=https%3A//esr.ucpress.edu/content/ESS-10/1/12&title=Review%3A%20Asian%20America%3A%20Chinese%20and%20Japanese%20in%20the%20United%20States%20Since%201850%20by%20Roger%20Daniels
was not found on this server. That’s all we know.