mercury textile techniques long and short stitch indigenous peoples weave accession number documentation digital Code of Ethics for Museums Museo Histórico Nacional Useful addresses Publications Belgium floral ornaments pattern-taking identification of lace 19th century materials wedding dress protection conservation chain-link mesh hair Weaving vacuum Laos inspiration Chile collective identity idioms manufacture Angel cuffs cap stockings donor Cotton space Queen Juliane Marie Ramie Pattern-taking Canadian storage Princess Margaret Guidelines photos mauvine Collections Trust UK drama exhibition femininity jacket Preparing the public Munich allergens Royal Collections silk interlinking outline stitch care reconstruction