Massachusetts, near their home at 30 Leavitt Street, and Dwiggins' studio at 45 Irving Street. After Dwiggins' wife's death, many of Dwiggins' works and assets passed to his assistant Dorothy Abbe. A full-length biography of Dwiggins by Bruce Kennett, believed to be the first, was published in 2018 by the Letterform Archive museum of San Francisco. Typefaces Dwiggins' interest in lettering led to the Mergenthaler Linotype Company, sensing Dwiggins' talent and knowledge, hiring Dwiggins in March 1929 as a consultant to create a sans-serif typeface, which became Metro, in response to similar type being sold from European foundries such as Erbar, Futura, and Gill Sans, which Dwiggins felt failed in the lower-case. Dwiggins went on to have a successful working relationship with Chauncey H. Griffith, Linotype's Director of Typographic Development, and all his typefaces were created for them. His most widely used book typefaces, Electra and Caledonia, were specifically designed for Linotype composition and have a clean spareness. The following list of his typefaces is thought to be complete. Dwiggins had the misfortune of entering the field of type design during a period that encompassed, successively, the Great Depression and the Second World War, and as a result, many of his designs did not progress beyond experimental castings. Several of his typefaces saw commercial release only after his death, or, while not released themselves, have been used as inspiration for other designers. Metro series Metrolite + Metroblack (1930, Linotype) Metrothin + Metromedium (1931, Linotype) Metrolite No.2 + Metroblack No.2 (1932, Linotype) Metrolite No.2 Italic + Lining Metrothin + Lining Metromedium (1935, Linotype) Metromedium No.2 Italic + Metroblack No.2 Italic (1937, Linotype) Metrolight No.4 Italic + Metrothin No.4 Italic (Linotype) The Metro series was redesigned on entering production, with several characters changed to better echo the then-popular Futura. This formed the Metro No. 2 series. Some revivals return to Dwiggins' original design choices or offer them as alternates. Electra series Electra + Electra Oblique (italic) (1935, Linotype) Electra Bold + Italic (Linotype) Electra Cursive (1940, Linotype, a true italic for Electra) Matching ornaments, sometimes called the Caravan series (Linotype) Charter (Designed 1937–42, used only for one book, never released, Linotype) Hingham (Designed 1937–43, cut in 7 pt. but not released, Linotype) Caledonia series Caledonia + Italic (1938, Linotype) Caledonia Bold + Italic (1940, Linotype) Arcadia (Designed 1943–47, used only for Typophile's Chapbook XXII, never released, Linotype) Tippecanoe + Italic (Designed 1944–46,