Punctuation centuries meant that a standard system of punctuation was urgently required." The introduction of a standard system of punctuation has also been attributed to the Venetian printers Aldus Manutius and his grandson. They have been credited with popularizing the practice of ending sentences with the colon or full stop, inventing the semicolon, making occasional use of parentheses and creating the modern comma by lowering the virgule. By 1566, Aldus Manutius the Younger was able to state that the main object of punctuation was the clarification of syntax. By the 19th century, punctuation in the western world had evolved "to classify
Mark (name) century, when it began to be used alongside the classical form Marcus. In the Celtic legend of Tristan and Isolde this was the name of a king of Cornwall. It was also borne by the American author Mark Twain (1835–1910), real name Samuel Clemens, the author of 'Tom Sawyer' and 'Huckleberry Finn'. He actually took his pen name from a call used by riverboat workers on the Mississippi River to indicate a depth of two fathoms. This is also the usual English spelling of the name of the 1st-century BC Roman triumvir Marcus Antonius (Mark Antony). Mark (name) Mark is