In consequence of the ravages of the Great Plague in 1665 and the subsequent disaster of the Great Fire in 1666 there was for some time a total cessation in London of theatrical performances and all other amusements. Dryden, like most other persons who were not tied to town by business, spent the greater part of this gloomy period in the country. He availed himself of the interruption thus given to his dramatic labours to produce his first writings of any moment out of that field, his _Annus Mirabilis_ and his _Essay on Dramatic Poesy_. The first, an attempt to invest with heroic interest, and celebrate in sonorous stanzas, the events of the famous years 1665-6, including not only the Great Fire, but also the incidents of a naval war then going on against the Dutch, must have done more to bring Dryden into the favourable notice of the King, the Duke of York, and other high personages eulogized in it, than anything he had yet written. It was, in fact, a kind of short epic on the topics of the year, such as Dryden might have been expected to write if he had been already doing laureate's duty; and, unless Sir William Davenant was of very easy temper, he must have been rather annoyed at so obvious an invasion of his province, notwithstanding the compliment the poet had paid him by adopting the stanza of his _Gondibert_, and imitating his manner. Scarcely less effective in another way must have been the prose _Essay on Dramatic Poesy_--a vigorous treatise on various matters of poetry and criticism then much discussed. It contained, among other things, a defence of the Heroic or Rhymed Tragedy against those who preferred the older Elizabethan Tragedy of blank verse; and so powerful a contribution was it to this great controversy of the day that it produced an immediate sensation in all literary circles. Sir Robert Howard, who now ranked himself among the partisans of blank verse, took occasion to express his dissent from some of the opinions expounded in it; and, as Dryden replied rather tartly, a temporary quarrel ensued between the two brothers-in-law.