Vellacott lectured on Greek drama on four tours in the US and spent time as a visiting lecturer at the University of California at Santa Cruz.[2] He retired in 1967 to Radnorshire, where he carried on writing until his death in 1997.
Writing in Latin: Style and Idiom for Advanced Latin Prose (1970), with D. P. Simpson
Sophocles and Oedipus: a Study of Oedipus Tyrannus with a New Translation (1971)
Ironic drama: a Study of Euripides' method and meaning (1975)
The Logic of Tragedy: Morals and Integrity in Aeschylus' Oresteia (1984)
An English reader's guide to Sophocles' Oedipus Tyrannus and Oedipus Coloneus (1993)
Translations
Aeschylus: The Oresteian Trilogy (Agamemnon, The Choephori, The Eumenides) (1956)
Aeschylus: Prometheus Bound and other plays (Prometheus Bound, The Suppliants, Seven Against Thebes, The Persians) (1961)
Euripides: Alcestis and other plays (Hippolytus, Iphigenia in Tauris, Alcestis) (1953) (republished as Three Plays (1972))
Euripides: The Bacchae and other plays (Ion, The Women of Troy, Helen, The Bacchae) (1954)
Euripides: Medea and other plays (Medea, Hecabe, Electra, Heracles) (1963)
Euripides: Orestes and other plays (The Children of Heracles, Andromache, The Suppliant Women, The Phoenician Women, Orestes, Iphigenia in Aulis) (1972)
Theophrastus: The Characters, and Menander: Plays and Fragments (1967)