Instructions
Open the Stewart Edward White book to the title and copyright page. Look for a line above the copyright date that says "First Printing," "First Edition" or "First Pressing." This will tell you immediately if the volume is a first edition.
Look at the copyright date. If one date is listed, it may be a first edition. If there are a number of dates separated with commas, it still may be a first edition, with the other dates indicating the publication of sections of the book; however; this is less likely.
Compare the dates on the title page and the copyright date. If they are the same, the volume is more than likely a first edition.
Examine the number line, a series of numbers and letters, which would only be present if the book was published after World War II. In most cases, if there is a numeral "1" in the number line, the book is a first edition.