By A. W. Ward, G. W. Prothero and Stanley Leathes, The Cambridge Modern History, Volume 2… (1904)
“ In the original plan no provision had been made for the Reformation in Poland. This topic hardly seemed by its importance to deserve a separate chapter, and there were obvious reasons against including it in any of the others. On the other hand it could not be altogether neglected. A brief summary, compiled by one of the Editors, may serve to fill the gap. ”
