They were originally intended as replacements for the British East Indiaman in the trade between England, the Cape of Good Hope, India and China.
Under different owners these yards had built East Indiamen since the early 17th century as well as warships for the Royal Navy.
Another feature of early Blackwall frigates was a highly rounded hull at the bow above the waterline, such ships being referred to as "apple-cheeked".
They were generally considered to be safe and comfortable ships and were employed in premium trades, but were the victims of some of the most celebrated shipwrecks of the 19th century.
The True Briton made frequent voyages to Australia and New Zealand carrying passengers, convicts and cargo.