"late 18th century or early 19th century" . "late 18th century- early 19th century" . . "1776/1825" . "1776 / 1825" . "1776=1825" . "Late 18th century\u2013early 19th century" . "late 18th century-early 19th century" . . . . . "late 1700s- early 1800s" . "late 1700s-early 1800s" . "late 18th century - early 19th century" .