Allen, William. <br/><br/>
A narrative of the expedition sent by Her Majesty's government to the river Niger, in 1841 under the command of Capt. H.D. Trotter / 
by Capt. William Allen and T.R.H. Thomson. 
 - London :  R. Bentley,  1848. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Niger Expedition, 1841.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Niger River -- Description and travel.--Niger River -- Description and travel.<br/>Africa, West -- Description and travel.--Africa, West -- Description and travel.