TEXT: The asterisk at the end of the previous paragraph and these four “X”s in the left margin are keyed to another asterisk and similar “X”s on a slip of paper, indicating that the text on the slip should be inserted here. The following paragraph is encircled, likely to indicate that the text on the slip should replace the circled lines.
TEXT: The “26 X” in the left margin is apparently keyed to the second of two slips of paper inserted between pages 26 and 27. However, the corresponding text on the slip is also keyed to page 26, and context suggests it should be inserted there.