Since his day the works have been in careful and competent hands, and admirable porcelain is still produced in many styles. MARKS.--The Vincennes mark used from 1745 to 1753 was the interlaced L's without any inclosed letter, like the first mark of Sèvres. Beginning at 1753 the Sèvres mark was the interlaced L's inclosing the letter A. The marks at Sèvres changed many times, so that it is necessary to give quite a list of them as well as a table showing how the letters of the alphabet indicate the year when the piece was made. The following table will help to explain the use of the letters of the alphabet when placed in the interlaced L's: A 1753 B 1754 C 1755 D 1756 E 1757 F 1758 G 1759 H 1760 I 1761 J 1762 K 1763 L 1764 M 1765 N 1766 O 1767 P 1768 Q 1769 R 1770 S 1771 T 1772 U 1773 V 1774 X 1775 Y 1776 Z 1777 AA 1778 BB 1779 CC 1780 DD 1781 EE 1782 FF 1783 GG 1784 HH 1785 II 1786 JJ 1787 KK 1788 LL 1789 MM 1790 NN 1791 OO 1792 PP 1793 QQ 1794 RR 1795 T9* 1801 X* 1802 11* 1803 --\\-- 1804 /|\ 1805 ==:== 1806 7 1807 8 1808 9 1809 10 1810 o.z. (onze) 1811 d.z. (douze) 1812 t.z. (treize) 1813 q.z. (quatorze) 1814 q.n. (quinze) 1815 s.z. (seize) 1816 d.-s. (dix-sept) 1817 18 1818 19 1819 Etc., etc. [Illustration: _A comet was sometimes used as a mark in the year 1769._] Marks used at Sèvres: [Illustration: _The royal period, sometimes with a crown (1753)._] [Illustration: _Hard paste first made (1768)._ _Republic (1792 to 1798)._] [Illustration: _Republic (1792)._] [Illustration: _Consular period (1803)._] [Illustration: _Imperial manufactory (1804 to 1809)._] [Illustration: _Imperial manufactory (1810 to 1814)._] [Illustration: _Louis XVIII., and the year (1814 to 1824)._] [Illustration: _Charles X. (1824 to 1829)._] [Illustration: _On plain ware (1829 and 1830)._] [Illustration: _On decorated ware (1829 and 1830)._] [Illustration: _Louis Philippe (August to December, 1830)._] [Illustration: _Louis Philippe (1831 to November, 1834)._]