to me that Slavery is so poisonous as to produce a kind of delirium in those minds who are excited by it. This question, and the manner of carrying it, is exciting great interest throughout the State, and has already kindled an extraordinary degree of excitement and warmth of feeling, which will no doubt continue to increase until the question is decided. I assure you, I never before felt so deep an interest in any political question. It preys upon me to such a degree, that I shall not be happy or feel at ease until it is settled. It is impossible to foresee the injurious effects resulting to this State of the unhappy consequences which may arise to the Union, from the success of the slave party in this State. Many of us who immigrated to this State under the solemn assurance that there should exist here "neither slavery nor involuntary servitude," will, if the slave faction succeeds, be compelled to sacrifice or abandon our property and seek new homes, we know not where, or remain in a community whose principles we shall disapprove of, and whose practice will be abhorrent to our feelings. And already we hear disputed the binding effect of the ordinance--the power of Congress to restrict a State, etc., etc., from which I fear, if the introduction of Slavery should be tolerated here, the discussions on the expediency and unconstitutionality of the measure will not in all probability be confined to the citizens of this State. But this is a part of the question too painful for me to dwell on. I trust the good sense and virtue of the citizens of Illinois will never sanction a measure so well calculated to disturb the harmony of the Union and so injurious to its own prosperity and happiness, as well as so directly opposite to the progress of those enlightened and liberal principles which do honor to the age. But to insure this it is necessary that the public mind should be enlightened on the moral and political effects of Slavery. You will confer a particular favor on me and promote the virtuous cause in which I am enlisted, by giving me information, or referring me to the sources from whence I can draw it, calculated to elucidate the general character and effects of Slavery--its moral, political and social effects--facts showing its effects on the price of lands, and general improvement and appearance of a country--of labor both as it respects agriculture and manufactures, etc., etc. The State of Pennsylvania having been long distinguished for its attachment to free principles, there is no doubt but what you can procure in Philadelphia many valuable pamphlets and publications which would throw light on this question. Any which you may have it in your power to procure and forward, will be most thankfully received,