Knowledge that does not come from a catalogue.

Frederick Van de Walle has worked with the world’s leading deep-sea recovery operation since 2007 — as consultant and, for six years, as its Director of Conservation — responsible for collections totalling 31,000 artefacts from documented wreck sites, recovered from depths down to 4,700 metres.

The relationships are current. The knowledge of what each collection actually holds comes from inside that work — not from a catalogue.

Why depth means preservation.

The deeper a shipwreck lies, the better its chance of preservation. Beyond 50 metres, time slows — light fades, currents slacken, the temperature plummets and oxygen thins. Past 400 metres, the threat of destruction by fishing trawlers diminishes. Deeper still, the sunken past lies cocooned in a vast oceanic cold store.

The deepest collection represented here came from 4,700 metres: the SS Gairsoppa, lying nearly a mile deeper than the Titanic, under pressure of 6,690 pounds per square inch — a half-ton weight on every square inch. From that darkness, books, shoes and 717 preserved letters were recovered alongside more than 110 tons of silver.

The standard that makes this possible.

Every introduction concerns objects with documented recovery, clear title, and lawful export. Each acquisition is supported by the full archaeological and conservation record — recovery data, treatment history, publication references.

Where any of that is not available, no introduction is made. This standard is not negotiable; it is the reason the service can exist at all.

— Postgraduate Certificate in Art Crime & Cultural Heritage Protection, ARCA

Three steps. Full documentation. No commitment until certainty.

Holmes acts as advisor and introducer — any interest in a transaction is declared in advance, in writing.

Boord & Son London gin. Sealed since 1917.

In February 1917, the SS Mantola sailed from London for Calcutta. Among her cargo: cases of gin from Boord & Son, one of London’s oldest distilleries, founded 1726 and famous for its Old Tom. She was torpedoed by German submarine U-81 on 8 February and sank 2,500 metres into the North Atlantic, 143 miles off Fastnet.

She was found a century later. A small number of full bottles were recovered under a UK Department for Transport salvage contract. The original Boord & Son lead seal — Cat & Barrel motif, brand name intact — and the liquid inside have survived 107 years at depth. The iridescence on the glass is unreproducible: a century of chemistry at 2,500 metres.

Unlike comparable shipwreck gin bottles from other recoveries, every Mantola bottle carries full attribution: distillery, city, object ID, recovery record. These are not anonymous antique bottles. They are documented, attributed, and conserved to archaeological standard.

These bottles are available for private acquisition. Documentation includes full conservation records from the salvage operation. Enquiries by introduction only — contact Holmes Heritage Consulting.

Further reading: Shipwreck spirits bottles →  ·  BBC: SS Mantola silver haul →