The Brothers Grimm, Jacob (1785–1863) and Wilhelm (1786–1859), so well known for collecting folk and fairy tales, also wrote the definitive German dictionary - those green books that Molly is using as a bed. The undertaking was so ambitious that it was only completed in 1961, many years after their deaths. Alas, my German is not yet good enough to make use of it.
Die Brüder Grimm
by Elisabeth Jerichau-Baumann
Nice as that dictionary is, what I really, really covet is a first edition of the dictionary written by Samuel Johnson (1709 - 1784): A Dictionary of the English Language, published 1755. (Considering it would put one back a few thousand euros, pounds, or dollars, it will remain a dream.)
Dr. Samuel Johnson
by Sir Joshua Reynolds
One of my all time favourite programmes, Blackadder, has an episode which casts one of my all time favourite actors, Robbie Coltrane, as Samuel Johnson: "Ink and Incapability". It deals with the creation of Johnson's dictionary. Do check it out if you can. It's a hoot and a half.