Jevons's Elementary Lessons in Logic, Lesson X (pp.81–87), is the text behind Aikins's "Jevons, p. 82" and "Jevons, p. 83" conversion-rule citations

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Jevons's Lesson X, "Conversion of Propositions, and Immediate Inference," opens on p.81 of the 1881 Macmillan "New Edition" printing of Elementary Lessons in Logic; on p.82 it states: "we must observe two rules (1) the quality of the proposition (affirmative or negative) must be preserved, and (2) no term must be distributed in the Converse unless it was distributed in the Convertend." This matches, almost word for word, Aikins's quotation in Chapter XI of his 1902 Principles of Logic: "No term must be distributed in the Converse, unless it was distributed in the Convertend (Jevons, p. 82)."

The correspondence continues onto p.83. Jevons writes there of the difficulty converting a proposition of form O, "because its subject is undistributed; and yet the subject should become by conversion the predicate of a negative proposition, which distributes its predicate" — followed, on the same page, by his account of "Conversion by Negation." Aikins's Chapter XI quotes precisely this sentence, cited "(Jevons, p. 83)," with the conversion-by-negation material also cited to p.83. Both of Aikins's page-cited quotations are therefore traceable to specific, identifiable sentences on the stated pages of this Jevons text, not a paraphrase or a different work.

This resolves question-verify-aikins-1902-jevons-source-edition-for-conversion-and-syllogism-rules for the conversion-rule half of that question, and grounds the page citations in claim-aikins-1902-ch11-quotes-jevons-conversion-rules-verbatim-then-rejects-rule-following in Jevons's own text rather than Aikins's paraphrase of it. See claim-jevons-elementary-lessons-lesson-xv-source-of-aikins-eight-syllogism-rules for the companion match on the syllogism-rules side of the same question, and claim-jevons-elementary-lessons-1881-printing-toc-confirms-stable-pagination-since-1870 for the independent pagination check.