Hence you may steer West 3/4 South through the night, on which course you will very gradually deepen your water.
...
APPENDIX A.SECTION 9.
TABLE: DIP OF THE MAGNETIC NEEDLE, OBSERVED DURING THE MERMAID'S AND BATHURST'S VOYAGES UPON THE COAST OF AUSTRALIA.
COLUMN 1: DATE.
COLUMN 2: PLACE.
COLUMN 3: LATITUDE SOUTH IN DEGREES MINUTES SECONDS.
COLUMN 4: LONGITUDE EAST IN DEGREES MINUTES SECONDS.
COLUMN 5: DIP OF THE NEEDLE IN DEGREES MINUTES SECONDS.
COLUMN 6: NORTH OR SOUTH END.
COLUMN 7: VARIATION IN DEGREES MINUTES SECONDS.
COLUMN 8: REMARKS.
1817.

October 9, November 28 : Port Jackson, East Coast : 33 51 : 151 15 : 62 1 30 : South : 8 42 East : Observed on shore, on the north side of Sydney Cove.
1819.

January : Hobart Town, Van Diemen's Land : 42 54 : 147 27 : 70 7 00 : South : 9 00 East : Observed on shore.
June 16 : Cleveland Bay, East Coast : 19 10 : 146 56 : 44 6 40 : South: 5 12 1/2 East : Two observations made at the extremity of the cape.
July : Endeavour River, East Coast : 15 27 : 145 11 : 38 00 00 : South: 5 27 East : Taken at the tent.
1818.

April : Goulburn Island, North Coast : 11 38 : 133 20 : 27 32 30: South : 2 0 East : Taken on Bottle Rock, in South-west Bay.
1820.

October : Careening Bay, North-west Coast : 15 6 1/4 : 125 0 : 38 44 36 : South : 0 43 1/2 West : Taken at the tent.
Dip of the Needle at Port Louis, Simon's Bay, and various parts of the Atlantic Ocean, observed upon the Bathurst's return to England.
1821.