446 
APPENDIX, 
officers and men under your command into proper pai’tles for 
those several purposes. 
In order to preserve a due uniformity of method in the execu- 
tion of your surveys, as well as in the objects and tendency of 
your geographic engineers, Ave haA^'e directed our hydrographer 
to furnish you with proper extracts from the instructions usually 
given to our surveyors ; and we desire that you will correspond 
with him on all the subjects connected with his department, and 
that you will transmit to him tracings of all your charts and 
sketches, and duplicates of all your observations. 
Duplicates, also, of all your dispatches to our secretary should 
ill variably be kept ready for convenient opportunities of for- 
warding them to any of Her Majesty’s cruisers which may be 
employed in the Bight in preventing the approach of slavers 
during your stay in the rivers, and one of which will, until the 
1st of October, be directed to appear close off the mouth of the 
River Nun on every full and change day of the moon, or on such 
other days a.s may be agreed upon by you and the senior officer in 
the Bight, and to remain there till sunset for the purpose of receiv- 
ing your communications, and on the following morning to com- 
municate with the palm-oil ships at Bonny for the same purpose. 
After the first four months, however, it is probable that your 
communication will bo loss frequent, and you will therefore 
make the necessary arrangement with the senior officer in the 
Bight as to more extended periods, or as to more appropriate 
points, at which the above-mentioned cruiser is to touch the 
shore. 
Ingenious and costly contrivances for ventilating the vessels 
under your command having been fully supplied, as well as 
every article of nutriment or medicine which can tend to pre- 
serve or restore the health of your crews, or which may enable 
tbera to resist the reputed malaria of the climate, wc desire that 
in the full and unsparing employment of all these resources you 
will keep in miud not only the immediate benefit and daily com- 
fort of your own people, but also that you are carrying out a 
series of sanatory experiments of high importance to our future 
communication with those and other similarly situated countries. 
Notwithstanding the above means of obviating or dispelling 
