Still another difficulty occurred, in the mechanical labor of writing, which I found a severe trial to the eye. This was remedied by means of a writing-case, such as is used by the blind, which enabled me to commit my thoughts to paper without the aid of sight, serving me equally well in the dark as in the light. The characters thus formed made a near approach to hieroglyphics; but my secretary became expert in the art of deciphering, and a fair copy--with a liberal allowance for unavoidable blunders--was transcribed for the 'use of the printer. I have described the process with more minuteness, as some curiosity has been repeatedly expressed in reference to my modus operandi under my privations, and the knowledge of it may be of some assistance to others in similar circumstances.

Though I was encouraged by the sensible progress of my work, it was necessarily slow. But in time the tendency to inflammation diminished, and the strength of the eye was confirmed more and more. It was at length so far restored, that I could read for several hours of the day though my labors in this way necessarily terminated with the daylight.

Nor could I ever dispense with the services of a secretary, or with the writing-case; for, contrary to the usual experience, I have found writing a severer trial to the eye than reading,--a remark, however, which does not apply to the reading of manuscript; and to enable myself therefore, to revise my composition more carefully, I caused a copy of the "History of Ferdinand and Isabella" to be printed for my own inspection, before it was sent to the press for publication. Such as I have described was the improved state of my health during the preparation of the "Conquest of Mexico"; and, satisfied with being raised so nearly to a level with the rest of my species, I scarcely envied the superior good fortune of those who could prolong their studies into the evening, and the later hours of the night.

But a change has again taken place during the last two years. The sight of my eye has become gradually dimmed, while the sensibility of the nerve has been so far increased, that for several weeks of the last year Ihave not opened a volume, and through the whole time I have not had the use of it, on an average, for more than an hour a day. Nor can I cheer myself with the delusive expectation, that, impaired as the organ has become, from having been tasked, probably, beyond its strength, it can ever renew its youth, or be of much service to me hereafter in my literary researches. Whether I shall have the heart to enter, as I had proposed, on a new and more extensive field of historical labor, with these impediments, I cannot say. Perhaps long habit, and a natural desire to follow up the career which I have so long pursued, may make this, in a manner, necessary, as my past experience has already proved that it is practicable.

From this statement--too long, I fear, for his patience--the reader, who feels any curiosity about the matter, will understand the real extent of my embarrassments in my historical pursuits. That they have not been very light will be readily admitted, when it is considered that I have had but a limited use of my eye, in its best state, and that much of the time I have been debarred from the use of it altogether. Yet the difficulties I have had to contend with are very far inferior to those which fall to the lot of a blind man. I know of no historian, now alive, who can claim the glory of having overcome such obstacles, but the author of "La Conquete de l'Angleterre par les Normands"; who, to use his own touching and beautiful language, "has made himself the friend of darkness"; and who, to a profound philosophy that requires no light but that from within, unites a capacity for extensive and various research, that might well demand the severest application of the student.

The remarks into which I have been led at such length will, I trust, not be set down by the reader to an unworthy egotism, but to their true source, a desire to correct a misapprehension to which I may have unintentionally given rise myself, and which has gained me the credit with some--far from grateful to my feelings, since undeserved--of having surmounted the incalculable obstacles which lie in the path of the blind man.

Boston, April 2, 1847.