Pious perjury: Georgian juries lied about the value of stolen goods to keep thieves off the gallows

Core claims

1. A scientific-instrument workshop's brass supply ran partly on stolen metal. In 18th-century London, instrument-makers like George Adams sourced brass from foundries clustered around Aldersgate/Moorfields/Bishopsgate and Snow Hill/Shoe Lane — but "tradesmen settl[ed] their foundry bills in part through credit for old metal, while a brisk trade in stolen brass, often along the same routes, was fed by theft from workshops and storerooms." Source: http://journal.sciencemuseum.ac.uk/article/the-18th-century-instrument-trade/ — Tier 2.

2. That theft could legally be a capital crime. Under England's "Bloody Code," the number of capital offenses grew from about 50 (1688) to over 200 (1820), driven mostly by property-protection statutes. Grand larceny — "the theft of goods worth more than 12 pence, about one-twentieth of the weekly wage for a skilled worker" — carried the death penalty. A stolen brass compass or instrument part would easily clear that bar. Source: https://en.wikipedia.org/wiki/Bloody_Code — Tier 4 (uncontested historical figures, cross-corroborated across multiple independent search results).

3. Juries routinely lied to avoid enforcing it. "As the 18th century proceeded, jurors often deliberately under-assessed the value of stolen goods in order to avoid a mandatory death sentence" — a practice Blackstone is widely credited with naming "pious perjury" (e.g., valuing goods at 39 shillings to stay under the 40-shilling capital threshold). Source: https://en.wikipedia.org/wiki/Bloody_Code — Tier 4. [Blackstone's exact coinage of the term is reported by multiple secondary sources (Oxford Reference, legal-history summaries) but not independently confirmed here against his own Commentaries text — treat the attribution as well-corroborated but secondary.]

Why this was hop-worthy

The chain runs from a workshop's mundane brass supply chain straight into a legal system willing to hang someone over a compass — and then into the specific human workaround (a jury quietly lying under oath) that kept that system from actually doing so at scale.

Further leads

• Old Bailey Online's trial-search interface returned 403 on direct fetch this session — a proper primary-source pass (specific instrument-theft trials, actual valuations juries assigned) is still undone.
• A claimed 1756 statute criminalizing receiving stolen lead/iron/copper/brass surfaced only via Grokipedia (AI-generated, untrustworthy) and could not be corroborated on Wikipedia or in search — flagged, not used, candidate for sources.md low-trust list if it keeps recurring.
• Blackstone's Commentaries on the Laws of England as the second-most-cited authority among the American founders (after the Bible) — strong "person behind the thing" + cross-time bridge, saved for a future chain rather than force-fit here.

Hop chain

Hop 1: Science Museum Group Journal, "Reading, writing, drawing and making in the 18th-century instrument trade" — http://journal.sciencemuseum.ac.uk/article/the-18th-century-instrument-trade/

• Hook type: The surprising claim / cross-domain bridge
• Hook: "a brisk trade in stolen brass, often along the same routes" fed the same supply networks instrument-makers used legitimately.
• Why followed: A refined scientific trade running partly on a black-metal market is a genuine tension — mundane infrastructure crime intersecting a prestige craft — and it points toward a completely different domain (criminal/legal history) than the seed's economics framing.
• Key findings: George Adams consolidated instrument production/marketing under one roof; brass foundries clustered in specific London districts; theft from workshops and storerooms was routine enough to be a named feature of the supply chain.

Hop 2: Web search synthesis on Georgian metal theft and its legal treatment (multiple sources; landed on Bloody Code) — https://en.wikipedia.org/wiki/Bloody_Code

• Hook type: Surprising claim (quantitative + severity mismatch)
• Hook: Grand larceny — theft of goods worth over 12 pence — was a capital offense, and capital crimes grew from ~50 to 200+ between 1688 and 1820.
• Why followed: Zooms out from one trade's specific theft problem to the entire penal architecture that theft sat inside — the natural "field/historical context" move after a specific-detail hop.
• Key findings: Most new capital statutes targeted property crime specifically; a stolen instrument was easily within capital-crime value territory.

Hop 3: Same Wikipedia article + Oxford Reference cross-check (Oxford Reference blocked on direct fetch; corroborated via search snippet) — https://en.wikipedia.org/wiki/Bloody_Code

• Hook type: Mechanism question
• Hook: "Jurors often deliberately under-assessed the value of stolen goods in order to avoid a mandatory death sentence" — "pious perjury" (Blackstone's term).
• Why followed: Zooms back in from the broad legal system to the specific human mechanism that made the system survivable — how did a society run a law this harsh for over a century without mass hangings for petty theft?
• Key findings: Juries would value goods at 39 shillings specifically to duck the 40-shilling capital threshold; the practice was widespread and effectively an institutionalized nullification of the law's stated severity.

Saved hooks not followed:

• Old Bailey trial search (blocked, 403 on direct fetch) — would ground this in an actual named instrument-theft case rather than the general pattern; worth a retry via a different access path.
• The 1756 "criminalizing receiving stolen brass/copper/lead" statute claim — sourced only to Grokipedia, could not corroborate, discarded rather than used.
• William Blackstone's Commentaries and its outsized influence on American founding-era law (second most-cited authority after the Bible, per multiple search results) — strong person-behind-the-thing + cross-time bridge, saved for later rather than extending this already-complete chain.

post-worthy: maybe — a clean, surprising three-step arc (instrument trade -> capital law -> jury workaround) grounded in one Tier 2 and cross-corroborated Tier 4 sources, but would benefit from one primary Old Bailey case before it's publication-ready.