For 10 points, identify this comical history play about the two title Oxford clergymen, the best known work of Robert Greene.
At the end of this work, two squires use a magic glass to observe their fathers fighting and kil ing each other, after which the squires also fight and kil each other. One character in this play engages in a magic duel with Jacques Vandermast by conjuring the tree from the Garden of the Hesperides, but Vandermast  conjures up Hercules, who tears the branches from that tree, and is only stopped by the intervention of  the first title character. In this work, the words "Time is," "Time was," and "Time has been," are uttered by a head made of brass which is then shattered by a magical hammer, foiling the first title character's  attempts to surround England with a wal of brass. The story of this play's title characters is intertwined with the romance between Lacy, Earl of Lincoln, and Margaret, daughter of the Keeper of Fressingfield  Park, and this play is set during the time of Henry III and ends with the prophecy of prosperity during the rule of Elizabeth I. For 10 points, identify this comical history play about the two title Oxford clergymen, the best known work of Robert Greene.
At the end of this work, two squires use a magic glass to observe their fathers fighting and kil ing each other, after which the squires also fight and kil each other.
Friar Bacon and Friar Bungay