Indexing Footnotes and Endnotes Without Losing the Discussion

A reader follows an index entry to page 91 and finds a small superscript, but no explanation of the subject. The explanation is in a note that continues onto page 92. The entry has found the right note and still sent the reader to the wrong place.

Notes require two decisions: whether their content deserves index access, and how to direct readers to it. Keeping those decisions separate prevents both unnecessary entries and lost discussions.

Agree the notes policy first

Publisher instructions differ. The publicly available Chicago indexing chapter from the fifteenth edition distinguishes substantive notes from documentation alone. Routledge’s indexing guide says notes are not normally indexed, while providing a locator format when they are. Establish the policy for this book before approving individual note entries.

For a subject index that includes substantive notes, ask what a reader gains by following the entry. A note may supply a definition, an exception, a disputed interpretation, or evidence unavailable in the main text. Its small type does not make that information less useful.

A citation-only note may add no subject information. A separate author index may still include its cited names under the book’s agreed policy. Do not use the subject-index decision to settle the author-index decision.

Separate the callout, the discussion, and the locator

• The reference marker is the number or symbol in the main text that calls the note.
• The note’s discussion is the content the reader needs, possibly spread across several pages.
• The index locator is the printed instruction for reaching that content, expressed in the publisher’s chosen style.

These locations can coincide for a short footnote. For an endnote they may be far apart: a callout on page 91 might lead to note text on page 310. A locator intended to retrieve the note should identify the note text’s location under the agreed convention.

A note across two pages

• Page 91, main text: “The scheme established a formal eligibility rule.” A superscript 71 follows the sentence.
• Page 91, footnote 71 begins: “The rule covered permanent employees from their first month of service.”
• Page 92, the same footnote continues: “Seasonal workers qualified only after two complete seasons. This exception is absent from the summary table.”

The seasonal-worker exception deserves access because it supplies a distinction the main text does not explain. Under the stated convention, “seasonal workers, eligibility, 92n71” directs readers to the specific discussion. The number 92 identifies the printed page; n71 identifies note 71. Neither the callout on page 91 nor the note’s opening sentence gives readers the information promised by that entry.

The cited Chicago chapter normally uses a continued note’s opening page, but specifies the later page when the reference concerns that part of the note. For a heading covering useful material on both pages, check the house rule. Enid L. Zafran’s 2009 handout Do Notes Have You in Knots? illustrates a page range for that situation; our invented example would become 91–92n71. Preserve the full discussion during review, then apply the agreed printed convention.

Now imagine a different note containing only “See the study cited in the bibliography, pp. 44–48.” This invented note points outside the book; it does not explain seasonal-worker eligibility. Those cited pages are pages of another work, not locators to add to this book’s index.

When similar-looking fragments need review

Before choosing a locator, establish which fragments belong to the note. A continuation can begin with a complete sentence and lack a repeated number. Matching type size and indentation suggest a connection; they cannot establish what the words refer to.

• An unnumbered paragraph begins “He argues…” after a page break. Read the preceding note to resolve the pronoun and confirm whether this is a continuation or a separate note.
• A wrapped citation line begins “2003) 77.” The year and cited page belong to the bibliographic reference; they do not necessarily introduce a new note.
• Extracted text repeats a number beside a table. Compare it with the visible proof: hidden duplicate text is not evidence of a second printed note.

Treat an uncertain connection as a review decision. Joining unrelated fragments can manufacture a discussion; leaving a genuine continuation detached can hide its most useful part. Neither outcome is repaired by formatting the locator neatly.

Check before approving a note locator

• ✓ Confirm that this index’s scope includes the relevant note content.
• ✓ Read the complete note alongside the main-text passage it supports.
• ✓ Identify the useful information promised by the heading or subheading.
• ✓ Locate that information in the visible proof, including any continuation.
• ✓ Apply the agreed page, note-number, and range convention. If endnote numbering restarts by chapter, include enough information to distinguish otherwise identical locators.
• ✓ Follow the finished locator as a reader would and confirm that it retrieves the promised discussion.