Most items below are based on advertised events before they happened, so have not been necessarily confirmed. Where we have a confirmation a talk was cancelled, we have included the item but noted the cancellation.

1966
December 11th. Meeting 10 Churchton St. Victoria, London:
“James L. Walker and the Philosophy of Egoism.”

19??
November 4th. Lecture to the London Secular Group:
“Heaven’s Below-Fact and Fiction.”

1976
January 7th. Lecture to the London Secular Group:
“The Atheism of Max Stirner.”

1978
February 23rd. Lecture to the Lewisham Humanist Group:
“Max Stirner and the Case Against Humanism.”

1981
November 26th. Lecture to the Lewisham Humanist Group:
“Nietzsche – Antichrist?”

1983
February 24th. Lecture to the Lewisham Humanist Group:
“Is Egoism a Perversity?”

1984
May 1st. Lecture (cancelled) to the London Secular Group:
“The Idiocy of Idealism.”

1985
January 31st. Lecture to the Lewisham Humanist Group:
“Equality: is it a myth?”

1986
January 19th. Debate with Terry Liddie on the topic:
“This House Maintains that the Freethought Movement Devotes Too Much of its Resources to Political Campaigns”.
Parker was in favor of the proposition, Liddie against.

1987
February 26th. Lecture to the Lewisham Humanist Group:
“Why be moral?”

1987
October 18th. Lecture to the Leicester Secular Society:
“Democracy and Other Delusions: A Critical Look at Some Modern Sacred Cows.”

1988
October 23rd. Lecture to The South Place Ethical Society at Conway Hall:
“Max Stirner: Philosopher of Egoism.”
A summary of that talk is printed in The Ethical Record of January, 1989 (PDF).

1989
June 18th. Lecture to The South Place Ethical Society at Conway Hall:
“Nietzsche and Christianity.”
A summary of that talk is printed in The Ethical Record of September, 1989 (PDF).

1990
June 3rd. Lecture to The South Place Ethical Society at Conway Hall:
“The Myth of Morality.”
A summary of that talk is printed in The Ethical Record of January, 1991 (PDF).

*Many thanks to Denis Cobell, who was secretary to the Lewisham Humanist Group for information on his talks.