14.  The last defect which I will note is, that there hath not been, or very rarely been, any public designation of writers or inquirers concerning such parts of knowledge as may appear not to have been already sufficiently laboured or undertaken; unto which point it is an inducement to enter into a view and examination what parts of learning have been prosecuted, and what omitted.  For the opinion of plenty is amongst the causes of want, and the great quantity of books maketh a show rather of superfluity than lack; which surcharge nevertheless is not to be remedied by making no more books, but by making more good books, which, as the serpent of Moses, might devour the serpents of the enchanters.

15.  The removing of all the defects formerly enumerate, except the last, and of the active part also of the last (which is the designation of writers), are opera basilica; towards which the endeavours of a private man may be but as an image in a crossway, that may point at the way, but cannot go it.  But the inducing part of the latter (which is the survey of learning) may be set forward by private travail.  Wherefore I will now attempt to make a general and faithful perambulation of learning, with an inquiry what parts thereof lie fresh and waste, and not improved and converted by the industry of man, to the end that such a plot made and recorded to memory may both minister light to any public designation, and, also serve to excite voluntary endeavours.  Wherein, nevertheless, my purpose is at this time to note only omissions and deficiences, and not to make any redargution of errors or incomplete prosecutions.  For it is one thing to set forth what ground lieth unmanured, and another thing to correct ill husbandry in that which is manured.

In the handling and undertaking of which work I am not ignorant what it is that I do now move and attempt, nor insensible of mine own weakness to sustain my purpose.  But my hope is, that if my extreme love to learning carry me too far, I may obtain the excuse of affection; for that “It is not granted to man to love and to be wise.”  But I know well I can use no other liberty of judgment than I must leave to others; and I for my part shall be indifferently glad either to perform myself, or accept from another, that duty of humanity—­Nam qui erranti comiter monstrat viam, &c.  I do foresee likewise that of those things which I shall enter and register as deficiences and omissions, many will conceive and censure that some of them are already done and extant; others to be but curiosities, and things of no great use; and others to be of too great difficulty, and almost impossibility to be compassed and effected.  But for the two first, I refer myself to the particulars.  For the last, touching impossibility, I take it those things are to be held possible which may be done by some person, though not by every one; and which may be done by many, though not by any one; and which may be done in the succession of ages, though not within