Rodolphe Boudreau
Clerk of the Privy Council
May 6, 1907 to
August 4, 1923
Ernest Joseph Lemaire
Clerk of the Privy Council
August 14,
1923 to January 1st, 1940
Arnold Danford Patrick (A.D.P.) Heeney, C.C.
Clerk of the
Privy Council and
Secretary to the Cabinet
March 25, 1940 to March 14,
1949
Norman Alexander Robertson, C.C.
Clerk of the Privy Council
and
Secretary to the Cabinet
March 15, 1949 to May 31, 1952
The Right Honourable John Witney Pickersgill,
P.C.
Clerk of
the Privy Council and
Secretary to the Cabinet
June 1, 1952 to June 1,
1953
Appointed Member of the Queen's Privy Council
June 12, 1953