A photocopy of pages from a 'Memoir explaining the construction of the charts of Australia, with remarks upon the observations for the latitude, longitude, and variation, made on board His Majesty's ship the Investigator, in the years 1801, 2, and 3; by Matthew Flinders Commander'. There are two main sections:

1. Chapter VI: 'Of the incorporation, in Sheet No. 6, of those parts of Bass's Strait seen in the schooner Francis and sloop Norfolk in 1798 and 1799, with those laid in the Investigator' (pp. 591-595).

2. Chapter VII: 'Concerning the chart of the passage between New Guinea and Australia, called by Mr Dalrymple Torres' Strait' (pp. 596-613).

These chapters are preceded by two pages of a table of situations of places ascertained by Matthew Flinders whilst on the 'Reliance' during 1795-1800 (p. 587 and p. 591 only).