ABBO : A monk of Saint-Germain cles Pres, born about the middle of the ninth century, died in 923. He wrote a poem in Latin describing the siege of Paris by the Northmen in 885-886.

AMMIANUS MARCELLINUS : Military historian. Died shortly after 390. His work first printed at Rome 1474. The latest edition is that of V. Gardthausen, 1874-1875.

APPIAN : Historian. Lived at Rome during the reigns of Trajan, Hadrian and Antoninus Pius, 98-161. The best edition of his history is that of Schweighaeuser, 1785.

APOLLODORUS OF DAMASCUS: Built Trajan's Column, 105-113. Architect
and engineer. Addressed a series of letters to the Emperor Trajan on siege
engines (vide Thevenot).

ATHENAEUS : Lived in the time of Archimedes, B.C. 287-212. The author of a treatise on warlike engines (vide Thevenot).

BITON : Flourished about 250 B.C. Wrote a treatise on siege engines for throwing stones (vide Thevenot).

BLONDEL, FRANCOIS : French engineer and architect; born 1617 ; died 1686.

CAESAR, JULIUS (the Dictator): Born B.C. 100; died B.C. 44. Author of the 'Commentaries ' on the Gallic and Civil wars.

CAMDEN, WILLIAM: Born 1551; died 1623. Antiquary. Published his 'Britannia' 1586-1607.

COLONNA, EGIDIO : Died 1316. Archbishop of Bourges 1294, after having been tutor to Philip the Fair of France. His best known works are 'Quaestiones Metaphysicales ' and ' De Regimine Principum ;' the latter was written about 1280. Colonna gives a description of the siege engines of his time.

DANIEL, PERE GABRIEL: Historian. Born 1649; died 1728. Published 'Histoire de France,' 1713.

DIODORUS (The Sicilian) : Historian. Lived under Julius and Augustus Caesar (Augustus died A.D. 14). The best modern edition is that edited by L. Dindorf, 1828.

FABRETTI, RAFFAEL : Antiquary. Born 1618 ; died 1700.

FROISSART, JEAN : French chronicler. Born about 1337 ; died 1410. His chronicles printed about 1500. Translated into English by Lord Berners, and published 1523-1525.

GROSE, FRANCIS: Military historian and antiquary. Born about 1731; died 1791. Published ' Military Antiquities ' 1786-1788.

HERON OF ALEXANDRIA: Mechanician. Lived B.C. 284-221. Bernardino Baldi edited his work on arrows and siege engines, 1616 (vide Thevenot).

ISIDORUS, BISHOP OF SEVILLE : Historian. Died 636.