The problem of verbal aspects received very little attention in Prokosch’s Comparative Germanic Grammar—only two and a half pages; and what is said there is phrased in vague generalities. Nothing definite is given referring specifically to Germanic languages. The Bibliographical Notes, which are quite abundant for other chapters, have not a single reference to this section of the book. This is in utter contrast with Behaghel’s treatment of the subject, who in his Deutsche Syntax devotes two and a half pages (printed in very small type) exclusively to bibliographical references, more than half of them dealing with perfective and imperfective aspects in Gothic, Old High German, Old Saxon, Old English, Middle High German, and Netherlandish. Additional bibliographical references can be found in C. R. Goedsche’s article on verbal aspect in German, and in the recent book by R. H. Ružić.