22 September 1884 certain Edith May Lanyon is born in Mineral Point, Wisconsin Mineral Point, Wisconsin with Walter Clemow Lanyon, Edith May Lanyon 1 source
1907 certain Walter Lanyon competes in Carthage Collegiate Institute essay contest Carthage Collegiate Institute, Carthage, Missouri with Walter Clemow Lanyon 1 source
c. May 1907 unresolved Lanyon graduates Carthage Collegiate Institute (Harlow Shapley valedictorian class) Carthage, Missouri with Walter Clemow Lanyon, Harlow Shapley 4 sources
c. 1911 unresolved Walter Lanyon takes a post as stenographer in the American Express office in Paris Paris with Walter Clemow Lanyon 2 sources
1911 unresolved Walter Lanyon sails for England aboard the Lusitania, to witness the coronation from Montreal possible to England with Walter Clemow Lanyon 5 sources
before 1911 unresolved Walter Lanyon works in a railroad office in Chicago Chicago with Walter Clemow Lanyon 2 sources
6 June 1912 probable Walter Lanyon returns home from Europe aboard the Celtic Carthage, Missouri with Walter Clemow Lanyon 2 sources
1915 unresolved Walter Lanyon visits after studying voice in Paris Santa Barbara possible with Walter Clemow Lanyon 1 source
c. 1916 unresolved Edith May Lanyon dies at her parents' home in Carthage after an abscess operation Carthage, Missouri with Walter Clemow Lanyon, Edith May Lanyon 2 sources
16 March 1917 probable Lanyon introduces Christian Science lecturer George Shaw Cook at Carthage High School Carthage, Missouri with Walter Clemow Lanyon, George Shaw Cook 4 sources
October 1917 probable Lanyon publishes "And It Was Told of a Certain Potter" Carthage, Missouri with Walter Clemow Lanyon 6 sources
1918 unresolved Walter Lanyon serves at Camp Funston during the First World War Camp Funston, Fort Riley, Kansas with Walter Clemow Lanyon 1 source
1918 unresolved Walter Lanyon sends home a collection of German war trophies from France Carthage, Missouri with Walter Clemow Lanyon 3 sources
September 1918 unresolved Lanyon's newspaper account of the St. Mihiel ('First All-American') offensive published France possible with Walter Clemow Lanyon 2 sources
21 October 1918 probable Walter Lanyon sends his brother a German propaganda leaflet picked up in France France with Walter Clemow Lanyon 2 sources
1919 unresolved Walter Lanyon returns from France after the First World War from France with Walter Clemow Lanyon 1 source
c. 1919 unresolved Walter Lanyon returns after thirteen months overseas with the 89th Division Newport News with Walter Clemow Lanyon 1 source
10 January 1919 probable Walter Lanyon witnesses the Luxembourg revolution and calls it a comic opera revolution Luxembourg with Walter Clemow Lanyon 2 sources
5 March 1919 probable Lanyon Arrives at Montpellier for AEF Post-Armistice University Program Montpellier, France with Walter Clemow Lanyon 2 sources
5 March 1919 probable Walter Lanyon writes home to his mother on his first morning at Montpellier Montpellier, France with Walter Clemow Lanyon 2 sources
1920 unresolved Lanyon installed as musician of the Carthage Masonic lodge Carthage, Missouri with Walter Clemow Lanyon 2 sources
c. 1920 unresolved Walter Lanyon sings 'Madelon' in French in the American Legion's 'Passing Show' Carthage, Missouri possible with Walter Clemow Lanyon 2 sources
between 21 April 1920 and 22 April 1923 unresolved Webb City American Legion post considers staging Walter Lanyon's war play Webb City, Missouri with Walter Clemow Lanyon 2 sources
1921 unresolved Walter Lanyon performs as Tony opposite Mrs. Sidney Knight in an Italian comic sketch with Walter Clemow Lanyon 2 sources
after 17 December 1921 unresolved Walter Lanyon writes and directs 'Oh, Milly, Wait a Minute' for the Good Fellows Christmas fund Pittsburg, Kansas with Walter Clemow Lanyon 9 sources