What Is a Gathering (or Quire)? — The Building Blocks of a Book
A gathering (also called a quire or signature) is a group of leaves formed by folding one or more printed sheets and then nesting them together. These folded units are sewn together through the spine fold to create the text block — the stack of pages that forms the body of a bound book. Every traditionally bound book, from a medieval manuscript to a modern hardcover, is built from gatherings.
How Gatherings Are Formed
The Printing Process
In traditional letterpress printing:
- A large sheet of paper is printed with multiple pages on each side (a process called imposition)
- The printed sheet is folded so that the pages fall in correct reading order
- The folded sheet becomes a gathering
The number of folds determines how many leaves the gathering contains:
- One fold = 2 leaves (4 pages) — a folio gathering
- Two folds = 4 leaves (8 pages) — a quarto gathering
- Three folds = 8 leaves (16 pages) — an octavo gathering
- Four folds = 16 leaves (32 pages) — a sextodecimo gathering
Assembly
After folding, the gatherings are assembled in correct sequence. In traditional bookbinding, each gathering is sewn through its center fold onto cords or tapes that run along the spine. The sewn gatherings, together, form the text block.
Signature Marks
What They Are
Signature marks (or simply signatures) are small letters, numbers, or symbols printed at the bottom of certain leaves to guide the binder in assembling the gatherings in correct order. Typically, the first leaf of each gathering is signed with its identifying letter, and subsequent leaves within the gathering may carry the same letter with a number (A, A2, A3, A4; then B, B2, B3, B4; etc.).
Historical Usage
Signature marks appeared early in printing history — they are found in incunabula from the 1470s. The convention of using letters of the alphabet (A through Z, then Aa, Bb, etc. for longer books) became standard by the early sixteenth century.
Modern Usage
In modern commercial printing, signature marks are often replaced by or supplemented with other guides — collating marks (printed dashes on the spine fold that create a stepped pattern when gatherings are correctly assembled) and electronic tracking codes.
Gatherings and Collation
What Collation Means
Collation is the bibliographer’s description of a book’s physical structure — recording the sequence of gatherings, the number of leaves in each, and any irregularities (cancels, inserted leaves, missing leaves).
A collation formula uses a standardized notation:
A–Z⁸ Aa–Ff⁸ Gg⁴
This formula tells us the book consists of:
- Gatherings A through Z (26 gatherings of 8 leaves each = 208 leaves)
- Gatherings Aa through Ff (6 gatherings of 8 leaves each = 48 leaves)
- Gathering Gg (4 leaves)
- Total: 260 leaves = 520 pages
Why Collation Matters
Collation is essential for:
Verifying completeness — by comparing a book’s actual gatherings against the standard collation (from a bibliography or reference work), you can determine whether any leaves are missing.
Identifying cancels — a cancel is a leaf that has been removed and replaced (usually to correct an error). Cancels are detectable through collation because the replaced leaf may differ in paper, typography, or attachment method.
Establishing edition identity — different editions or printings of the same text may have different collation structures, helping bibliographers distinguish between them.
Gatherings in Manuscript Books
Before printing, manuscript books were also constructed from gatherings. Medieval scribes wrote on sheets of parchment (animal skin) or paper that were folded and nested into quires. The standard medieval quire consisted of:
- Four sheets folded once = 8 leaves (a quaternion)
- Larger or smaller quires were used as needed
Scribes planned their page layouts to account for the quire structure, and the quire sequence was tracked through catchwords (the first word of the next quire, written at the bottom of the last leaf of the current quire) and quire signatures.
Practical Relevance for Collectors
Checking Completeness
When evaluating a rare book for purchase, check the gathering structure:
- Look for signature marks at the bottom of early leaves in each gathering
- Verify that the sequence is unbroken (no skipped letters)
- Check that no leaves are obviously missing or replaced
- For valuable books, compare against the standard collation in a bibliography
Identifying Repairs
Gatherings that have been resewn (removed from the binding, repaired, and reattached) may show evidence of the work — new thread, trimmed edges, or differences in paper aging. This is not necessarily a negative (conservation work is sometimes necessary), but it should be noted and disclosed.
Binding Quality
The quality of the sewing that holds the gatherings together is a key indicator of binding quality. In well-made traditional bindings, the sewing is tight and even, with the gatherings opening smoothly and the spine flexing naturally. In poorly made or deteriorated bindings, the sewing may be loose, broken, or missing, causing gatherings to become detached.
Understanding gatherings is understanding the physical structure of the book — the engineering that transforms flat sheets of paper into a three-dimensional object that opens, lies flat, and protects its contents for centuries. It is one of the most fundamental concepts in bibliography and one of the quiet marvels of bookmaking technology.