the north-east, in the neighborhood of Kilimanjaro.

[Sidenote: The River Rovuma a strategic line.]

[Sidenote: Pursuit of enemy across Rovuma is difficult.]

The southern boundary between German East Africa and Portuguese East
Africa was formed by the River Rovuma, which, coming from the high
plateau and the mountains to the east of Nyasa, is one of the large
African rivers. Except in its highest reaches near Lake Nyasa it is not
fordable, and makes an admirable strategic line. However, as Portugal
came into the war after most of the German colony had already been
occupied by us, this river acquired strategic importance only toward the
end of the campaign, and then in a sense adverse to us, as General Van
Deventer has found to his cost. After the remnants of the German native
forces had been driven across the Rovuma at the beginning of December,
1917, our forces found the swift pursuit across the river a difficult
task. We are, however, now operating against the roving bands into which
the enemy force has split, and if ever they try to break back to their
occupied colony, they will find the line of the Rovuma a very serious
barrier.

[Sidenote: The search for the German raider _Königsberg_.]

[Sidenote: The _Königsberg's_ guns accompany the enemy on land.]

The eastern boundary of the colony is the coast-line of the Indian Ocean
for almost five hundred miles, with some very beautiful harbors, and it
was dominated by our navy from the day that war was declared. The Royal
Navy has played a very active part in our African campaigns, and one of