Instr. Lat. St. Paul's Sch. (Concord, NH), 1902-5; instr. to prof. Gk. Harvard, 1905-37; Eliot prof. Gk. lit., 1937-43; mem. AAAS.
"Quas partes equi habebant in religionibus Graecorum" (Harvard, 1901)
"Classical Elements in Browning's Aristophanes' Apology," HSCP 20 (1909) 15-73; "An Ancient Letter Writer, Alciphron" Harvard Essays on Classical Subjects (Boston, 1912) 67-96; "The Latin Epyllion," HSCP 24 (1913) 37-50; "Molle atque facetum, Horace Satires 1.10.44," HSCP 25 (1914) 117-37; "The Decree-Seller in the Birds, and the Professional Politicians at Athens," HSCP 30 (1919) 89-102; Index Verborum C. Suetoni Tranquilli, with A. A. Howard (Cambridge, 1922); "Herbert Weir Smyth," HSCP 49 (1938) 1-21.
Jackson was conspicuously reserved in his contacts with colleagues and students at Harvard, although the word was that he displayed an entirely different personality when he went up to New Hampshire for the summer and was exchanging small talk there with relatives. His lectures were delivered with Olympian detachment, but his Survey Course in Greek Literature was one of the finest courses offered in his department, at least during the 1930s and early 1940s. The student who took good notes in that course accumulated nearly all the factual knowledge he needed to pass the most exacting Ph.D. orals in Greek.Behind a somewhat forbidding manner, he had a truly kind and sympathetic nature. One graduate student recalls pacing nervously before the door of the room where his Ph.D. orals were to be given, and receiving reassurance from none other than Professor Jackson. "Do not be upset when we ask you questions you cannot answer," he was told; "we try to pursue any line of questioning until we reach the point where the candidate's font of knowledge runs dry." Jackson's own font never did seem to run dry.