This sad news via WWD, September 14, 2019: “Illustrator Pierre Le-Tan Dies”
To the left is Mr. Le-Tan’s first New Yorker cover. Below, his entry on the A-Z.
Pierre Le-Tan 
Born, Neuilly-sur-seine, France, 1950. Died, September 17, 2019. New Yorker work: one drawing, June 14, 1976. Although his one cartoon technically qualifies him as a member of the Spill’s One Club, Mr. Le-Tan contributed 18 New Yorker covers between February 14, 1970 through April 27, 1987.
His one cartoon, a double page spread:
A New Yorker cover from April 9, 1979
Further Reading:
From Architectural Digest, September 20, 2019: “French Artist Pierre Le-Tan Leaves An Indelible Mark”
From frenchculture. org, “In Memoriam: Pierre Le-Tan”
See his New Yorker covers here.