1885 
Born
December 18, New York City
mother Polish, father Scottish
1899 Becomes printer - works for Max Lubrun a Russian intellectual and job printer
1900
Enrolls at City College of New York
Begins 4 year apprenticeship at De Vinne Press
Receives BS from CCNY
Awarded Chemistry Prize Scholarship to Johns Hopkins University
Becomes school teacher
1906
Joins International Typographical Union
Accepts Johns Hopkins Scholarship
Works as proofreader at Baltimore Sun to meet expenses
1912
Receives MD from Johns Hopkins
Joins United States Public Health Service
1918
Travels extensively for US Public Health Service
Marries Dr. Sarah K. Greenberg - obstetrician and gynecologist
1920
Leaves Public Health Service
Becomes 1st Industrial doctor in NYC - works for McGraw Hill publishing Co.
Meets Sol Cantor
1921
Becomes partner with Sol Cantor in Enmore Linotype Co. - a trade typesetter
1926
Cantor and Leslie sell Enmore Linotype Co. to Louis Statenstein of
American Book-Stratford Press
Spends next year as salesman for Statenstein
1927
Leslie and Cantor establish The Composing Room, Inc.
1934
Begins publishing PM magazine created on death of Gebrauchsgraphik the
German Graphic Arts magazine
1935
Features George Salter
in September issue of PM
1936
Thomas Benrimo
featured in January 1936 issue of PM
Lucien Bernhard featured in March 1936 issue of PM - first recognized feature by an emigré designer.
May 1936 PM cover designed by George Salter
Gustav Jensen featured in September 1936 issue of PM
PM Gallery Exhibits work of Herbert Matter
Photographer Samuel
Bernard Schaeffer featured in October 1936 issue of PM
1937
A.M Cassandre
featured in January 1937 issue of PM
E. McKnight Kauffer featured in March 1937 issue of PM
Illustrator Laszlo Matulay featured in September 1937 issue of PM
Photographer Samuel Bernard Schaeffer featured in October 1937 issue of PM
Lester Beall
featured in November 1937 issue of PM
1938
Walter Gropius
authors two articles on the Bauhaus and Architectural education in February/March
issue of PM
Hans Barschel featured in April/May issue of PM
The Bauhaus featured in June/July 1938 issue of PM - cover designed by M. Peter Piening - Design of Bauhaus pages by Lester Beall
Paul Rand featured
in October/ November 1938 issue of PM
1939
Dr. Mehemed Fehmy Agha
featured in August / September 1939 issue of PM
Herbert Bayer authors three articles on design in December 1939 issue of PM
PM Gallery Exhibits work of Hans
Alexander Mueller - April
1940
PM magazine’s name sold to Ralph Ingersoll
György Kepes featured in February / March issue of PM - announces change of name
April/May 1939 issue becomes A-D Magazine - features Joseph Binder
Jean Carlu featured in August / September 1941 issue of A-D
Ballet of the ABC's insert designed by Herbert Matter and illustrated by Gondor in October/November 1940 issue of A-D
PM / A-D Gallery Exhibits work of Susanne
Suba
1941
Paul Rand featured
in February/March 1941 issue of A-D
George Giusti featured in April/May 1941 issue of A-D
Alex Steinweiss featured in June/July 1941 issue of A-D
Summer Exhibit through September 2
Printing and Advertising Arts 1840 - 1890
Studies in Advanced Design
Students of Herbert Bayers American Advertising Guild Class
Growing Art
Childrens Art Work (mentioned in October / November issue of A-D)
1942
E. McKnight Kauffer
featured in December 41/January 1942 issue of A-D
Will Burtin designs issue of A-D magazine with insert of 10 years of his work
A-D Gallery Exhibits
Advance Guard
of Advertising Artists
through March
Frank Barr, Herbert Bayer, Lester Beall, Jean Carlu, E. McKnight Kauffer,
Herbert Matter, Laszlo Moholy Nagy, Paul Rand, Ladislav Sutnar
Stops the printing of A-D magazine during WWII
Joins Office of Information Service
1945
A-D Gallery Exhibits
Lettering & Calligraphy in Current Advertising and Publishing
May 11 - June 29
Arnold Bank, Frank Bartuska, Toni Bonagura, William Brooke,
J. Albert Cavanagh, Warren Chappell, Edgard Cirlin, T. M. Clelan,
W. A. Dwiggins, Philip Grushkin, Robert Haas, J. J. Herman,
Rand Holub, Gustav Jensen, M. R. Kaufman, Riki Levinson,
Sam H. Marsh, William Metzig, Oscar Ogg, George Salter,
David Soshenski, Andrew Szoeke, Tommy Thompson, Jeanyee wong, Miriam Woods
A Guide to Lester Beall
November 19 - December 31
1946
A-D Gallery Exhibits
Four Veterans
Herbert Bender, Charles Egri, Gene Federico, Seymour Robins
Gergely / Barschel
Tibor Gergely, Hans J. Barschel
March 26 - April 26
1947
A-D Gallery Exhibits
Ladislav Sutnar
January 10 - February 28 1947
Covers his work from 1929-1946
Paul Rand
March 31 - May 29
Visual Communications Techniques
October 4 - November 28
Alex Steinweiss
1948
A-D Gallery Exhibits
Will Burtin
November 9, 1948 - January 14, 1949
Ben Rose shows his photographs at A-D Gallery in New York
1949
A-D Gallery Exhibits
Hal Zamboni
March 7 - April 29
Alvin Lustig
October 11 - December 2
Begins annual trips to Israel - continues throughout life
1950
A-D Gallery Exhibits
Morton Goldsholl
February 7 - March 31
1960
Monophoto Filmsetters join The Composing Room
Eleven leading designers from Paris exhibit at Gallery 303 in New York
Editorial art from McCall’s magazine shown at The Composing Room
1961
Creates Gallery 303 to display typographic arts
Gallery 303 Exhibits
George Salter
A Third of A Century of Graphic Work -December 1961
1963
Gallery 303 Exhibits
55 Years of Lucian Bernhard
Ernst Reichl - Book Titles & Book Design
Professor Georg Trump
exhibition of work at Gallery 303
1965
Begins “Heritage
of the Graphic Arts” lecture series at Gallery 303
Named Man of the Year by the Printing Teachers Guild of New York
1967
Receives “Service Industry Award” from the Navigators
1968
Hosts Dr. Giovanni Mardersteig for a special Gallery 303
lecture held at The Pierpont Morgan Library
1969
Retires as president of The Composing Room
Receives AIGA medal
1971
Sets up Uncle Bob's Paper Mill in Israel
1972
William H. and Harry J. Friedman Memorial Award
NCCJ Brotherhood Award
1973
Receives Frederic W. Goudy award from Rochester Institute of Technology
1976
Receives 1st Annual American Printing History Association Award
New York Printers Wall of Fame and Type Directors Club Medal
Travels to Europe with The Typophiles
1981
Records 4 hour interview with Professor Herbert Johnson at RIT
1987
Dies April 1 - New York City