[2] Trelawney first appeared in Lloyd's List's ship arrival and departure (SAD) in 1779 with Moore, master, and trade London–Jamaica.

The data in the table is from the records of the House of Lords concerning British Arctic whaling during the "bounty period" (1733–1824),[5] and Marshall.

In March 1789 she sailed again for Greenland in company with Norfolk, Hunter, Blakeney, and William.

[6] In November 1789 it was reported that the former Greenlandman Trelawney, was fitting out for the "Spermaceti fishery" in the South Seas.

At the time the government paid a bounty of £700 to the five vessels arriving in England from the south seas with the greatest amount of whale oil and head matter.

The Commissioners of Customs disqualified Trelawney, arguing that as she had touched at Carton Bay on her return, she had not been out the requisite 14 months.

Trelawney, of 287 tons (bm), launched at Liverpool in 1775, appeared in the 1800 issue of the Register of Shipping (RS),[11] the first year of its publication.

Lloyd's List reported in October 1812 that an American privateer had captured Trelawney, Walker, master, as she was outbound from South Shields.