Leona Clark, b: -

^{1922 USSR formed by Soviet states}
^{1939 - 1945 World War II}
^{1945 Atomic bomb detonated (Hiroshima)}
^{1950 Korean War begins}
^{1964 - 1973 Vietnam War}

^{1895 Marconi invents wireless telegraphy}
^{1899 Boer War begins}
^{1903 Wright brothers 1st plane flight}
^{1912 Titanic sinks on maiden voyage}
^{1914 - 1918 World War I}

^{1830 French Revolution}
^{1837 Queen Victoria assumes throne}
^{1854 Crimean War with Russia}
^{1869 Opening of Suez Canal}
^{1871 Franco - Prussian War}



	^{George K. Cogswell}^{b. d.}

^{Guy K. Cogswell}^b.1896 d.		^{Thomas J. O'Leary}^{b.1835 Milan, Ohio d.1903 Hutchinson, Kansas}

	^{Eliza J. O'Leary}^{b.1870 d.1927}	^{Angeline Boyle}^{b.1846 Ohio d.1914 Hutchinson, Kansas}





^Leona Clark^{b. d.}