Louis died in 1670, and Daniel in 1680. Besides Bonaventure, another son of Matthieu, Isaac, born in 1593, established a printing press at Leiden, where he carried on business from 1616 to 1625; but none of his editions attained much fame. The last representatives of the Elzevir printers were Peter, grandson of Joost, who from 1667 to 1675 was a bookseller at Utrecht, and printed seven or eight volumes of little consequence; and Abraham, son of the first Abraham, who from 1681 to 1712 was university printer at Leiden. Some of the Elzevir editions bear no other typographical mark than simply the words _Apud Elzeverios_, or _Ex officina Elseveriana_, under the _rubrique_ of the town. But the majority bear one of their special devices, four of which are recognized as in common use. Louis Elzevir, the founder of the family, usually adopted the arms of the United Provinces, an eagle on a cippus holding in its claws a sheaf of seven arrows, with the motto _Concordia res parvae crescunt_. About 1620 the Leiden Elzevirs adopted a new device, known as "the solitary," and consisting of an elm tree, a fruitful vine and a man alone, with a motto _Non solus_. They also used another device, a palm tree with the motto, _Assurgo pressa_. The Elzevirs of Amsterdam used for their principal device a figure of Minerva with owl, shield and olive tree, and the motto, _Ne extra oleas_. The earliest productions of the Elzevir press are marked with an angel bearing a book and a scythe, and various other devices occur at different times. When the Elzevirs did not wish to put their name to their works they generally marked them with a sphere, but of course the mere fact that a work printed in the 17th century bears this mark is no proof that it is theirs. The total number of works of all kinds which came from the presses of the Elzevirs is given by Willems as 1608; there were also many forgeries. See "Notice de la collection d'auteurs latins, français, et italiens, imprimée de format petit en 12, par les Elsévier," in Brunet's _Manuel du libraire_ (Paris, 1820); A. de Reume, _Recherches historiques, généalogiques, et bibliographiques sur les Elsévier_ (Brussels, 1847); Paul Dupont, _Histoire de l'imprimerie_, in two vols. (Paris, 1854); Pieters, _Annales de l'imprimerie Elsévirienne_ (2nd ed., Ghent, 1858); Walther, _Les Elséviriennes de la bibliothèque impériale de St-Pétersbourg_ (St Petersburg, 1864); Alphonse Willems, _Les Elzévier_ (Brussels, 1880), with a history of the Elzevir family and their printing establishments, a chronological list and detailed description of all works printed by them, their various typographical marks, and a plate illustrating the types used by them; Kelchner, _Catalogus librorum officinae Elsevirianae_ (Paris, 1880); Frick, _Die Elzevirschen Republiken_ (Halle, 1892); Berghman, _Études sur la bibliographie Elzévirienne_ (Stockholm, 1885), and _Nouvelles études, &c._ (_ib._ 1897).