Thomas Henry Clarkson, b: 1920 -

^{1950 Korean War begins}
^{1964 - 1973 Vietnam War}
^{1969 Armstrong first person on moon}
^{1986 Nuclear disaster at Chernobyl}
^{1989 Berlin wall falls}

^{1912 Titanic sinks on maiden voyage}
^{1914 - 1918 World War I}
^{1922 USSR formed by Soviet states}
^{1939 - 1945 World War II}
^{1945 Atomic bomb detonated (Hiroshima)}

^{1869 Opening of Suez Canal}
^{1871 Franco - Prussian War}
^{1895 Marconi invents wireless telegraphy}
^{1899 Boer War begins}
^{1903 Wright brothers 1st plane flight}


^{Carole Ann Clarkson}^{b. Private d.}

^{Janet Catherine Clarkson}^{b. Private d.}

^{Kathryn Mary Clarkson}^{b. Private d.}	^{Thomas Henry Clarkson}^{b.1920 d.1990}

^{John Michael Clarkson}^{b. Private d.}

^{Anne Frances Clarkson}^{b. Private d.}			^{William Henry Dawson}^{b. Tasmania, Aus. d.}

^{Beverly Anne Clarkson}^{b. Private d.}		^{William Vesey Dawson}^{b.1892 Gladesville, N.S.W., Aus. d.1974 Sydney, N.S.W., Aus.}	^{Bridget Dawson (Moylan)}^{b. d.}

^{Neil Thomas Clarkson}^{b. Private d.}	^Joan Dawson^{b.1925 d.2012 Coffs Harbour, Australia}		^{Charles Montgomery Heatley}^{b.1865 d.1934}

^{Lynnette Margaret Clarkson}^{b. Private d.}		^{Alice Maud Heatley}^{b.1895 d.1985}	^{Fanny Reeves}^{b.1865 d.1943}

^{Paul Thomas Clarkson}^{b. Private d.}