From COMM 455 student Lorena Arias:

While searching for articles JW may have written, I found a couple of lines in History Teacher’s magazine (Vol. 6, p. 187) in which Mary Williams, Ph.D, reviewed periodical literature. She wrote that “Poland’s Story” by JW is “a bird’s-eye view of Poland’s past history” that appeared in Century magazine’s May 1915 issue.

I tried to find “Poland’s Story” in Century but did not have any luck. However, I did find it on Google Books, among selected articles about the Russian empire. In this detailed article, JW explains the power struggle between Poland and Russia and the rise and fall of Poland.