include anything which links one Ideato another. See further " How to Remember " (to bepublished in February, 1900, by Warne & Co.).
This book was finally published in 1905. The introduction was written in 1899 and the mentioned Feb 1900 publication of How to Remember didn't happen until 1901.
Miles, Eustace Hamilton. How to Remember: Without Memory Systems or with Them. Frederick Warne & Co., 1901.