Houston, b: -

^{1964 - 1973 Vietnam War}
^{1969 Armstrong first person on moon}
^{1986 Nuclear disaster at Chernobyl}
^{1989 Berlin wall falls}
^{1991 Persian Gulf War}

^{1914 - 1918 World War I}
^{1922 USSR formed by Soviet states}
^{1939 - 1945 World War II}
^{1945 Atomic bomb detonated (Hiroshima)}
^{1950 Korean War begins}

^{1871 Franco - Prussian War}
^{1895 Marconi invents wireless telegraphy}
^{1899 Boer War begins}
^{1903 Wright brothers 1st plane flight}
^{1912 Titanic sinks on maiden voyage}


			^{Norman Sedrick Tonkin}^{b.1897 Upper , Western Australia d.1979 East Victoria Pa, Australia}

		^{Clarence Edwin Tonkin}^{b.1922 West , Western Australia d.1990 Perth, Western Australia}	^{Florence May Cole}^{b.1897 Maltmill Lane, UK d.1972 Gosnel, Western Australia}

	^Tonkin^{b. d.}		^{Carl Yolmar Trygg}^{b.1877 Kimito, Finland d.1944 Port Pirie, South Australia}

		^{Doris Linda Trigg}^{b.1921 Port Pirie, South Australia d.1981 Clare, South Australia}	^{Lydia Emily Pressley}^{b.1879 Adelaide, South Australia d.1956 Port Pirie, South Australia}

^Tonkin^{b. d.}			^{Alfred Spalding Houston}^{b.1882 Port Linc, South Australia d.}

		^{Henry Alfred William Houston}^{b.1911 Adelaide, South Australia d.1975 Marryatv, South Australia}	^{Phoebe Elizabeth Purcell}^{b.1884 Western Australia d.1943 Adelaide, Sa}

	^Houston^{b. d.}		^{William John Donlon}^{b.1881 South Australia d.1960 Gawler}

		^{Mary Mavis Donlon}^{b.1908 Broken, New South Wales d.1997 Adelaide, South Australia}	^{Edith Summerton}^{b.1878 Barunga, South Australia d.1948 Gawler, South Australia}