E. K. Chambers, The Elizabethan Stage, Vol. 3 (1923)
“ For the moment we are only concerned with the sixteenth century. A glance back over my footnotes will show many examples in which action is said to be ‘above’ or ‘aloft’, or is accompanied by the ascent or descent of personages from or to the level of the main stage. This interplay of different levels is indeed the outstanding characteristic of the Elizabethan public theatre, as compared with the other systems of stage-presentment to which it stands in relation. ”
