Many people seem not to be aware of, or ignore, the fact that there was a second edition of the Interlingua Grammar, published in 1955. I own a copy of the second edition. As nearly as I can tell, there are few if any changes in the grammar itself of the language. In the Preface to the second edition there is, "This Second Edition of our Interlingua Grammar is a carefully corrected reprint of the first. In its preparation we have gratefully made use of the comments from many students of Interlingua, especially ... [names follow]." My own recommendation is that the second edition of the IG be considered in place of the first.