Morning ledger. Afternoon ledger.
The Tide File is our daily notebook published twice: a tight morning ledger before 11:00 and an afternoon entry after 14:00. The name is metaphorical — we are not a hydrographic office — but the rhythm matches the river's double pulse of work boats and evening leisure traffic.
Before Quay Margin existed as a website, the tide file was a physical ribbon book on the desk. Each page divided horizontally: top half for morning bullets, bottom half for afternoon paragraphs. Digital publication kept the horizontal rule. You will see it rendered as a hairline between sections on this page and in email archives.
Morning ledger · shape
Morning entries are numbered bullets, maximum twelve lines. Each line begins with a time stamp in 24-hour notation, followed by a verb. Example: "08:12 · Berth C tape removed." We avoid adjectives in the morning ledger because adjectives slow scanning. If a line requires context, the context waits for afternoon.
- 08:04 · Walkway lamps tested — north bank, all lit
- 08:19 · Notice posted on warehouse 27B — management change
- 08:41 · Barge cleared Robertson Reach eastbound
- 09:03 · Reading bench wiped after overnight rain
- 09:27 · Civic flyer removed from bridge pillar — archived
- 10:15 · Second reader signed harbour traffic draft
Morning ledger lines link to beats when a beat owner has verified the fact. Unverified lines carry a bracketed question mark until the afternoon pass clears or strikes them.
Afternoon ledger · shape
Afternoon entries allow one photograph and up to three paragraphs. The first paragraph answers why the morning line mattered; the second gives context readable by someone who did not walk the quay; the third, if present, states what we still do not know. Captions must fit in forty words — the same constraint as the Friday evening light beat.
On 14 August 2026 the afternoon ledger concerns warehouse 27B. A new management company posted a notice that gallery hours will shift from Friday-only to Thursday-through-Sunday. We photographed the notice at 14:22, filed the image with mark stage three on Copy Marks, and cross-linked beat three for tenancy tracking.
When the ledger becomes a safety sheet
If the river walk closes or a lighting fault makes the path unsafe after dark, the afternoon ledger collapses to a single safety notice. Morning bullets remain visible above the rule for audit purposes, but the afternoon section replaces prose with bold instructions: which entrance is closed, which detour is signed, and when we last confirmed the status with authorities.
Safety sheets expire at 06:00 the following day unless renewed. Renewal requires a fresh photograph of the closure tape or an official advisory URL. We do not renew from memory.
Archive policy. Ledgers older than thirty days compress into weekly PDFs linked from the bottom of this page. Plain-text email subscribers receive the compression notice on the first Monday of each month.
Corrections. Struck lines stay visible with a timestamp and the word CORRECTED in the margin. We do not silently delete morning bullets.
Reading the tide file with beats
Think of beats as weekly columns and the tide file as daily pulse. Beats summarise patterns; the tide file catches exceptions. A harbour traffic beat might say berths are stable all week, while a Thursday morning ledger notes a one-hour closure for maintenance. Both can be true simultaneously.
Editors who miss the morning pass — illness, public holiday, or field assignment — publish a ledger line that reads "Morning pass deferred" and fold the bullets into the afternoon section with double timestamps. Deferrals happen rarely; when they do, Desk Notes explains the backlog policy.
For office hours when ledgers are monitored live, see River Hours. To visit the desk, see The Landing.