The mechanism has two halves that craft discussion often runs together. Braiding is the interleaving of chains in the order of telling: how often the narrative changes thread, where, and in what proportions. Convergence is the relation the chains finally bear to each other. Braiding concerns the reading experience and convergence the story’s architecture, and a book can braid well and never converge, or converge decisively after a braid so sparse that the convergence is unearned. The two have to be designed together, and multiplicity is what joins them.
Multiplicity at book scale
Multiplicity, The Purposes of a Scene’s term (Chapter 1) for one unit of text doing several jobs at once, changes character at the scale of a thread. A sentence that does three things is an economy; a forty-page thread that does one thing is hard to defend, because no single function justifies that many pages. The requirement is stronger than doing several things in turn. The discipline is not to give a subplot more jobs but to find the version in which the jobs are the same act: a thread whose convergence is its counterpoint, where the object it hands the main plot is the object the comparison was about, does one thing that means two.
The chaplaincy vote in Middlemarch (chapter 18) shows how small such an act can be. Lydgate must cast the deciding vote for the chaplain of the new fever hospital. Bulstrode, who funds the hospital, supports Tyke; Lydgate prefers Farebrother, who is likeable, poor and needs the forty pounds; Lydgate votes for Tyke. The vote advances Lydgate’s chain, since his goal is medical reform and the hospital needs Bulstrode’s money; tests his character in a choice nothing forces; sets a third case of vocation compromised by money beside Dorothea’s and Farebrother’s; and plants, unnoticed, the obligation to Bulstrode that the novel later calls in. The thematic relation and the causal one are a single event at a committee meeting. Writers looking for multiplicity in their subplots tend to look at the large scenes, and it is more often found in small ones placed where several lines cross.
Where integration lives
Revision often looks for integration in theme, in a stated resemblance or an image repeated across threads. The work is mostly done in four plainer places. The first is a shared object or institution, a lawsuit, a hospital, a will, a shop, a ledger, which gives both chains something to do to the same thing and which memory holds better than it holds a parallel. The second is a crossing character, someone with motivated business in more than one chain. Stiva Oblonsky in Anna Karenina is Anna’s brother, Dolly’s husband and Levin’s friend, and nearly every crossing between the novel’s two great chains passes through him. Crime fiction has the role built in. In Kate Atkinson’s Case Histories (2004) three old cases, a small girl missing from a garden in 1970, a young woman stabbed in her father’s office in 1994 and a wife jailed for killing her husband with an axe in 1979, share nothing but the private detective Jackson Brodie, who is hired on all three, and a resemblance: each turns on a lost girl and a family that cannot stop looking. The cases are solved separately, and the book holds together because Brodie carries each into the others and because the resemblance is marked in every one. The third place is a repeated decision-shape: in the household novel people keep having to decide whether to say a true thing that will cost them, and a recurring kind of choice survives intervals that defeat imagery. The fourth is the placement of the crossing: a cut from the subplot’s small betrayal to the main plot’s large one asserts a relation that no sentence has to state.
Structures and rhythm
The Reference chapter lists fourteen braiding and convergence structures, and five cover most revision decisions. The alternating braid, regular alternation at chapter breaks, keeps threads warm and teaches the reader a pattern that can later be broken for emphasis. The block structure, long runs of one thread, buys immersion and charges the highest cost on return. Early convergence ties the threads cheaply and gives up the late payoff. Late convergence pays most and must be paid into throughout. In promotion, a thread presented as secondary is revealed as primary, as Magwitch’s is in Great Expectations. A thread that is not working is often the right material in the wrong structure, and the quickest test is to chart the book on one page, a row per chapter and a column per thread, and redraw the marks under another structure.
Rhythm is governed by the dormancy interval, the number of pages between a thread’s appearances, and by reinstatement cost, what the reader must spend to resume it. The bands in the table are conventions, not experimental findings; they describe a manuscript rather than legislate for it.
| Longest gap, as a share of the book | What resumption costs |
|---|---|
| Under 5% | Nothing: a name and an action |
| 5–10% | One sentence re-anchoring person, place and open question |
| 10–20% | A paragraph re-establishing the stake |
| 20–30% | A scene, in which the book is heard explaining itself |
| Over 30% | A new introduction; the thread reads as late-arriving |
Three refinements follow from the table. The longest gap matters, not the average: a thread seen in chapters 3, 5, 7 and 34 has a healthy average and a gap that destroys it. A distinctive thread survives about one band longer, so differentiating threads subsidises memory as well as supplying variety. And a thread left in the middle of an open question is recalled more cheaply than one left at rest (an inference from the frame research, not a measurement), so the cheapest repair is often to move a cut. A thread that converges at the climax should appear in the quarter of the book before it, and crossings that grow more frequent towards a convergence let the form announce it before any sentence does.
The ceiling
The limit on how many chains a book can run is not a count. War and Peace carries something like a dozen traceable chains and is not hard to follow, because its threads are anchored to families, its crossing characters are many (Pierre has business with the Bolkonskys, the Kuragins and the Rostovs), its crossings are frequent and short, and each family has a register that identifies a paragraph before a name appears. The ceiling is reached when readers can name the characters but not what any thread is trying to achieve. A book that runs three or more chains with none primary has become a multi-plot novel and inherits three duties: to declare itself early, which is The Opening Pages’s formal contract (Chapter 9); to let the relations between threads carry its argument; and to converge or rhyme at the end.
See also: the Reference mechanism, with all fourteen structures, the history from medieval interlace to the television season, and the patterns of crossing; multiplicity at book scale, with the full page-share and domain audit.