And bycause ye shall not thinke the maker hath premeditated beforehand any such fashioned ditty, do ye your selfe make one verse whether it be of perfect or imperfect sense, and giue it him for a theame to make all the rest upon: if ye shall perceiue the maker do keepe the measures and rime as ye haue appointed him, and besides do make his dittie sensible and ensuant to the first verse in good reason, then may ye say he is his crafts maister.
"The Arte of English Poesie"
George Puttenham