The dagger symbol originated from a variant of the
obelus, originally depicted by a plain line or a line with one or two dots . It represented an iron roasting spit, a dart, or the sharp end of a
javelin, symbolizing the skewering or cutting out of dubious matter. The system was further refined by his student
Aristophanes of Byzantium, who first introduced the
asterisk and used a symbol resembling a for an obelus; and finally by Aristophanes' student, in turn,
Aristarchus, from whom they earned the name of "
Aristarchian symbols". While the asterisk (
asteriscus) was used for corrective additions, the obelus was used for corrective deletions of invalid reconstructions. It was used when non-attested words are reconstructed for the sake of argument only, implying that the author did not believe such a word or word form had ever existed. Some scholars used the obelus and various other critical symbols, in conjunction with a second symbol known as the
metobelos ("end of obelus"), variously represented as two vertically arranged dots, a -like symbol, a mallet-like symbol, or a diagonal slash (with or without one or two dots). They indicated the end of a marked passage. It was used much in the same way by later scholars to mark differences between various translations or versions of the
Bible and other manuscripts. The
early Christian Alexandrian scholar
Origen ( AD) used it to indicate differences between different versions of the
Old Testament in his
Hexapla.
Epiphanius of Salamis (c. 310–320 – 403) used both a horizontal slash or hook (with or without dots) and an upright and slightly slanting dagger to represent an obelus.
St. Jerome (c. 347–420) used a simple horizontal slash for an obelus, but only for passages in the Old Testament. He describes the use of the asterisk and the dagger as: "an asterisk makes a light shine, the obelisk cuts and pierces".
Isidore of Seville (c. 560–636) described the use of the symbol as follows: "The obelus is appended to words or phrases uselessly repeated, or else where the passage involves a false reading, so that, like the arrow, it lays low the superfluous and makes the errors disappear ... The obelus accompanied by points is used when we do not know whether a passage should be suppressed or not." Medieval scribes used the symbols extensively for critical markings of manuscripts. In addition to this, the dagger was also used in notations in early
Christianity, to indicate a minor intermediate pause in the
chanting of
Psalms, equivalent to the
quaver rest notation or the trope symbol in
Hebrew cantillation. It also indicates a breath mark when reciting, along with the asterisk, and is thus frequently seen beside a
comma. In the 16th century, the printer and scholar
Robert Estienne (also known as Stephanus in
Latin and Stephens in English) used it to mark differences in the words or passages between different printed versions of the Greek
New Testament (
Textus Receptus). Due to the variations as to the different uses of the different forms of the obelus, there is some controversy as to which symbols can actually be considered an obelus. The symbol and its variant, the , is sometimes considered to be different from other obeli. The term 'obelus' may have referred strictly only to the horizontal slash and the dagger symbols. == Modern usage ==