John Walter Calvert, b: 1883

^{1945 Atomic bomb detonated (Hiroshima)}
^{1950 Korean War begins}
^{1964 - 1973 Vietnam War}
^{1969 Armstrong first person on moon}
^{1986 Nuclear disaster at Chernobyl}

^{1903 Wright brothers 1st plane flight}
^{1912 Titanic sinks on maiden voyage}
^{1914 - 1918 World War I}
^{1922 USSR formed by Soviet states}
^{1939 - 1945 World War II}

^{1854 Crimean War with Russia}
^{1869 Opening of Suez Canal}
^{1871 Franco - Prussian War}
^{1895 Marconi invents wireless telegraphy}
^{1899 Boer War begins}




	^{John Walter Calvert}^{b.1883 Myton, England d.}



^{Harry Calvert}^{b.1908 East Sculcoates, England d.1988 Hull, E.Yorkshire, England}

		^{Richard Poulson}^{b.1846 Melksham, England d.}

	^{Maud M Poulson}^{b.1883 East Sculcoates, England d.}

		^{Mary Ann Lundie}^{b.1849 E.Yorkshire, England d.}