Reference library
A permanent reference library for collectors, libraries and institutions: how sales are conducted, and how objects are catalogued, valued, cared for and consigned — written with the specialists engaged for our catalogues.
Featured guide
Light is the principal threat to drawings, watercolours, prints and photographs, and its effects cannot be reversed. This guide covers framing, glazing, display periods and safe storage.
Preservation & Care · 4 min read
Every guide is written from our own reference library and revised as practice changes. Nothing here is advertising: it is the same guidance we give collectors and owners in writing.
Library last revised 3 August 2026.
