LAST MISSION TO AFRICA. 
109 
completed with cross sticks. The two trees first laid over, 
which were permitted to sink in the water, served to pre- 
vent the stream from running away with the forks whose 
roots sloped down the stream ; whilst the weight of the 
current pressed on and kept firm the roots of such as were 
placed up the stream. A section of the bridge would have 
the following appearance. 
A. Trees first laid across. 
B. First range of forlis. 
C. Trees supported by first range. 
D. Second range of forks. 
E. Trees supported by ditto. 
F. Cross sticks for walking on. 
If the river was dried up, the structure 
would have somewhat of this appear- 
ance. 
Our people being all so sickly, I hired the Negroes to 
carry over all the baggage, and swim over the asses. Our 
