Often in this world of ingratitude and selfishness where every man is for himself, we are pleasantly surprised on opening our letters, to find that ml1ny contain thanks, and kind expressions of good-will, proving that inventors have not yet been corrupted by this world's ways. One morning last week we received four such, from which we make the following extracts : E. Sirret, Jr., of Buffalo, N. Y., writes: "I have received th'e patent which you secnred for me. I am very thankful for the efficient manner in which you conducted my business ; and when I or my father have more to do in that line (as we hope we shall soon) we shall most certainly call upon you again." B. Hazen, of Cincinnati, Ohio, says : " I have received from the city of Washington my Letters Patent for a corn husker, for which please accept my very gratcfnl acknowledgments." Joshua Tetlow, of Taunton, Mass., says : " I take great pleasure in informing you that the patent on my cotton gin, issued on the 13th inst., and that I received itthismorning. I feel glad that I entrusted you with the preparation of the necessary papers; andIassure you that if ever I shonld have any more patent business, I shall smely engage you to attend toit." John F. Taylor, of Charleston, S. C., remarks : "I have this day received my Letters Patent, and thank you for the promptnes. with which you have attended to all business I have ever entrusted to your carei" and again he says, " I would also state that I have been a regnlar subscriber to the Scientific A1eri-f can for a number of years, and have received X from it mnch valuable information." ,C These and many more of a similar charac-* ter which we receive daily (the above being but the result of a single mail) give us much pleasure and satisfaction, stimulating us ever to watch with care our clients' interests, and constitute apart from business relations, our almost hourly reward.