This extraordinary grass-barrier had already been met with at the time of Miss Tinné’s expedition in 1863; here again in the summer of 1872 was it found, strong as ever, offering for months its serious impediments to navigation, and threatening to expose the crews to destitution, if their provisions should fail. The enterprising expedition of Sir Samuel Baker, in 1870-71, suffered repeated hindrances at this spot. An attempt was made to employ machinery to penetrate the mass, but steam-boats proved to be even less successful than the ordinary boats in making any headway. The conflict in these waters by means of wind and steam recalls what is not unfrequently seen in Egypt when a lot of men try to drag a donkey through the mud. In this laborious fashion we had to toil on for several days. It was only by one of the side-arms of the blockaded mainstream that it was possible to reach the mouth of the Gazelle River. To this backwater the sailors give the name of “Maia Signora,” because the access to it is stated to have been discovered by the pilots who conducted Miss Tinné. Ever since the formation of the grass barrier (_el Sett_) there has been no approach to the river of Gondokoro, the Bahr-el-Gebel, except by a long side-arm called the Giraffe River, which is itself almost equally blocked up. Upon the whole we were more fortunate than our predecessors of previous years, because our journey chanced to fall during one of the periodical seasons when the growth of the ambatch is at a standstill. It happened therefore that of the three obstacles which (besides the current and the shallows) are generally to be expected, viz., grass, papyrus, and ambatch, one of the most important did not occur. The close of our first day’s exertion found us at night-fall on the southerly side of an island in mid-stream, whence we witnessed a spectacle striking in its way. Through an immense grove of acacias seventy feet high (_A. verugera_), which were remarkable for their resemblance to pine-trees, there gleamed, with the glare of day, the light of huge bonfires of faggots, which the Shillooks had kindled on the opposite bank, and which gave to the tall trees the effect of being truly gigantic.