The 1881 printing's own table of contents independently fixes Elementary Lessons in Logic's pagination (Lesson X at p.81, Lesson XV at p.126), consistent with the page numbers Aikins cites in 1902

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Before its main text, the 1881 Macmillan "New Edition" printing of Jevons's Elementary Lessons in Logic lists, in its own Table of Contents: "X. Conversion of Propositions, and Immediate Inference ... 81" and, under the heading "SYLLOGISM," "XV. The Rules of the Syllogism .... 126." These page numbers are fixed independently of any claim about the content of those lessons — they come from the book's own front matter — and they agree with where the conversion-rule and syllogism-rule passages actually appear in the body text (pp.82–83 and pp.127–128 respectively; see claim-jevons-elementary-lessons-lesson-x-source-of-aikins-conversion-rule-citations and claim-jevons-elementary-lessons-lesson-xv-source-of-aikins-eight-syllogism-rules).

Elementary Lessons in Logic was stereotyped and reprinted essentially unchanged for decades after its 1870 first edition — this 1881 scan is a "New Edition" printed eleven years after first publication, itself twenty-one years before Aikins's 1902 Principles of Logic. The agreement between this printing's internal pagination and Aikins's page citations is consistent with that stereotyping practice: a fixed-plate reprint preserves page numbers across printings in a way a reset or re-typeset edition would not, which is part of why a citation written in 1902 can still be checked, word for word, against a copy printed in 1881.