1854-1857       Address Unknown, Easton, Pennsylvania.

1860-1866       138 Northampton, Easton, Pennsylvania.[1]

1854 February 12.  The New York Herald.  (New York, New York.)  February 12, 1854, Whole No. 6381, P. 3.

American Genius—list of patents issued from the United States Patent Office for the week ending Feb. 7, 1854.  Each bearing that date—Reuben Knecht, of the borough of Easton, Pa.—For improved daguerreotype plate holder.  [Patent No. 10,508.]

1857 October 8.  The Press.  (Philadelphia, Pennsylvania.)  October 8, 1857, No. 59, P. 1.

The county fair will be held at Nazareth some eight miles from here, and will commence on Tuesday, the sixth proxime…

Another very pleasing and most attractive feature of the exhibition was the prince daguerreotypist of Easton, Mr. Ruben Knecht had not only the good fortune to display a collection of high artistic merit, but had also the shrewdness and good taste to select some of the prettiest faces in Easton (which is saying a good deal) for his subjects.  The reader will of course understand this as applying to the lady portion of the portraits.

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[1] Directory Of Pennsylvania Photographers 1839-1900.