For the very next reflection which I made was this, that an heroic
play ought to be an imitation, in little, of an heroic poem; and,
consequently, that love and valour ought to be the subject of it. Both
these Sir William D'Avenant had begun to shadow; but it was so, as
first discoverers draw their maps, with headlands, and promontories,
and some few outlines of somewhat taken at a distance, and which the
designer saw not clearly. The common drama obliged him to a plot well
formed and pleasant, or, as the ancients call it, one entire and great
action. But this he afforded not himself in a story, which he neither
filled with persons, nor beautified with characters, nor varied with
accidents. The laws of an heroic poem did not dispense with those of
the other, but raised them to a greater height, and indulged him a
farther liberty of fancy, and of drawing all things as far above the
ordinary proportion of the stage, as that is beyond the common words
and actions of human life; and, therefore, in the scanting of his
images and design, he complied not enough with the greatness and
majesty of an heroic poem.

I am sorry I cannot discover my opinion of this kind of writing,
without dissenting much from his, whose memory I love and honour. But
I will do it with the same respect to him, as if he were now alive,
and overlooking my paper while I write. His judgment of an heroic poem
was this: "That it ought to be dressed in a more familiar and easy
shape; more fitted to the common actions and passions of human life;
and, in short, more like a glass of nature, shewing us ourselves in
our ordinary habits and figuring a more practicable virtue to us, than
was done by the ancients or moderns." Thus he takes the image of an
heroic poem from the drama, or stage poetry; and accordingly intended
to divide it into five books, representing the same number of acts;