Edward Abbott Parry, Dictionary of National Biography… (1912)
“ Gilbert believed that the playwright should dominate the theatre. He was a master of stage management. In a privately printed preface to 'Pygmalion and Galatea' he pointed out that 'the supreme importance of careful rehearsing is not sufficiently recognised in England.' His experience, for which he vouched by statistics, taught him that when his pieces were carefully rehearsed they succeeded, and when they were insufficiently rehearsed they failed. ”
