No historical sketch of memory among the ancient Greeks and Romans is complete without some mention of their mnemonic systems. The art of mnemonics seems to have been much in vogue among them. There are frequent allusions to this art in the works of Aristotle, Plato, and other classic writers. Aristotle is reported by some to have written a work upon mnemonics. Every scholar of the classics is familiar with the story that ascribes the invention of the art to Simonides. The main principles of the ancient mnemonic systems according to Cicero and Quintilian were as follows. The thing to be remembered was localized by the imagination in some definite place—say in a room of a real or imaginary house; and, if necessary, a concrete symbol as vivid as possible was associated with it. This method was used by the Romans as an aid in oratory; and it has been said that the phrases, “_in the first place_,” “_in the second place_,” and the like, originated in this ancient practice. The ancient systems of mnemonics are inferior to the best modern systems, that, @since@ the days of Pick[50] have been based upon sound psychological principles. But the ancient systems were probably very helpful @to@ eye-minded people. The men with remarkable memories, mentioned by Cicero and other ancient writers very likely owed much to mnemonic aids. It is of special psychological interest to consider the ancient mnemonic devices in the light of such studies as those of Galton upon mental imagery, number forms, and the like.[51] The high estimate that many of the ancients placed upon the mnemonic art, may, perhaps, fairly be taken as evidence that what Galton calls the faculty of visualisation was developed among them. Especially some of the Roman orators seem to have possessed this faculty in a high degree. Biographical Note of the Author. I was born at Dunbarton, N.H. on the 3d of Dec. 1855, and am the youngest son of Samuel and Hannah Dane Burnham. I graduated at the High School at Manchester, N.H. in 1875. The next three years I spent in teaching and in study. In 1878 I entered Harvard College, and graduated in the Class of ’82. The following year was spent in teaching in the Preparatory Department of Wittenberg College. The next two years were spent at the State Normal School at Potsdam, N.Y., where my work was the teaching of Latin and Rhetoric. In 1885 I entered the Johns Hopkins University. In this university I have held the positions of Fellow in Philosophy and Fellow by Courtesy. My work has been chiefly under the direction of Prof. G. Stanley Hall and Dr. Richard T. Ely. William Henry Burnham. FOOTNOTES: ----- Footnote 1: For reference see Carus: Geschichte der Psychologie, pp. 150 & 169. Footnote 2: Theophrastus, 45. Footnote 3: Theophrastus, 4. Cf. Siebeck: Geschichte der Psychologie. Erste Abtheilung, p. 150. Footnote 4: Phaedrus, 73. Footnote 5: Philebus, 34. Footnote 6: