I have fixed Sidney's work for the boundary, beyond which I make few excursions.
From the authors which rose in the time of Elizabeth, a speech might be formed adequate to all the purposes of use and elegance.

If the language of theology were extracted from Hooker and the translation of the Bible, the terms of natural knowledge from Bacon, the phrases of policy, war, and navigation from Raleigh, the dialect of poetry and fiction from Spender and Sidney, and the diction of common life from Shakespeare, few ideas would be lost to mankind, for want of English words in which they might be expressed.
It is not sufficient that a word is found, unless it be so combined as that its meaning is apparently determined by the tract and tenor of the sentence, such passages I have therefore chosen, and when it happened that any author gave a definition of a term, or such an explanation as is equivalent to a definition, I have placed his authority as a supplement to my own, without regard to the chronological order that is otherwise observed.
Some words, indeed, stand unsupported by any authority, but they are commonly derivative nouns or adverbs, formed from their primitives by regular and constant analogy, or names of things seldom occurring in books, or words of which I have reason to doubt the existence.
There is more danger of censure from the multiplicity than paucity of examples, authorities will sometimes seem to have been accumulated without necessity or use, and perhaps some will be found, which might, without loss, have been omitted.

But a work of this kind is not hastily to be charged with superfluities; those quotations, which to careless or unskillful perusers appear only to repeat the same sense, will often exhibit, to a more accurate examiner, diversities of signification, or, at least, afford different shades of the same meaning: one will show the word applied to persons, another to things; one will express an ill, another a good, and a third a neutral sense; one will prove the expression genuine from an ancient author; another will show it elegant from a modern: a doubtful authority is corroborated by another of more credit; an ambiguous sentence is ascertained by a passage clear and determinate: the word, how often soever repeated, appears with new associates and in different combinations, and every quotation contributes something to the stability or enlargement of the language.
When words are used equivocally I receive them in either sense; when they are metaphorical, I adopt them in their primitive acceptation.
I have sometimes, though rarely, yielded to the temptation of exhibiting a genealogy of sentiments, by showing how one author copied the thoughts and diction of another: such quotations are indeed little more than repetitions, which might justly be censured, did they not gratify the mind, by affording a kind of intellectual history.
The various syntactical structures occurring in the examples have been carefully noted; the license or negligence with which many words have been hitherto used, has made our style capricious and indeterminate; when the different combinations of the same word are exhibited together, the preference is readily given to propriety, and I have often endeavored to direct the choice.
Thus have I labored by settling the orthography, displaying the analogy, regulating the structures, and ascertaining the signification of English words, to perform all the parts of a faithful lexicographer: but I have not always executed my own scheme, or satisfied my own expectations.

The work, whatever proofs of diligence and attention it may exhibit, is yet capable of many improvements; the orthography which I recommend is still controvertible, the etymology which I adopt is uncertain, and perhaps frequently erroneous; the explanations are sometimes too much contracted, and sometimes too much diffused, the significations are distinguished rather with subtlety than skill, and the attention is harassed with unnecessary minuteness.
The examples are too often injudiciously truncated, and perhaps sometimes--I hope very rarely--alleged in a mistaken sense; for in making this collection I trusted more to memory, than, in a state of disquiet and embarrassment, memory can contain, and purposed to supply at the review what was left incomplete in the first transcription.
Many terms appropriated to particular occupations, though necessary and significant, are undoubtedly omitted, and of the words most studiously considered and exemplified, many senses have escaped observation.
Yet these failures, however frequent, may admit extenuation and apology.

To have attempted much is always laudable, even when the enterprise is above the strength that undertakes it: to rest below his own aim is incident to every one whose fancy is active, and whose views are comprehensive; nor is any man satisfied with himself because he has done much, but because he can conceive little.