The most historically significant and widely influential pianoforte designs, both for use in public concerts and for domestic music making, first appeared in the later 1760s, mostly as the work of immigrant German-born craftsmen working in London. But their work was preceded by a handful of pioneering instrument makers whose lives have been largely unreported until now. In this paper the authors report on the life and work of three such immigrant craftsmen who made pianofortes and related instruments in London in the period 1740–65. Two of them, Roger Plenius and Herman Viator, met with great personal misfortunes, while the other, Frederick Neubauer, crowned his career with a great triumph which has never been widely reported, though unhappily not one of his instruments is known to survive. The authors' findings are drawn from newly located contemporary newspaper notices and original manuscripts held at The National Archives, Kew and the Bancroft Library, London.
