"1730-1734 \nca. 1890 \nca. 1740" . "1730~" . "1730[ca]" . . "1730[ca]-1750[ca] 1701=1800" . "possibly ca. 1730" . . "1730 circa" . "c. 1730" . . "about 1730" . "vers 1730" . "ca. 1730 (?)" . "ca. 1730" . . "1730~" .