a good tracheotomy set , Dutch, c.1880, by J C Aalders, Amsterdam, enony handled tenaculae, double ended bistoury, two silver tracheostomy tubes etc, in leather bound purple chamois and silk lined fitted case, case 19cm across; a set of three graduated steel trocars with ebony handles with a nest of three silver cannulae, in leather bound red velvet and silk lined fitted case, unsigned, case 16.1cm across; a matching pair of 19th century trocars in ebony cases each with silver cannula in the handle