99 x 75 mm. A view showing the wooden stagings of the fish traps. Photograph probably by Christy.

99 x 75 mm. A view showing the wooden stagings of the fish traps. Photograph probably by Christy.

98 x 75 mm. A view showing a section of the fisheries, with Africans seated on the rocks in the foreground.

96 x 73 mm. A view showing a section of the fisheries, with Africans seated on the rocks in the foreground.

76 x 101 mm. A view showing a trelliswork fig tree growing in forest land. The complete caption reads 'The trelliswork fig tree after complete fusion of the roots and the rotting away of the stem of the supporting tree'.

74 x 100 mm. The complete caption reads 'A still further stage in the development of the trelliswork fig tree, showing early buttresses and the stem becoming solid'.

76 x 99 mm. The full caption reads 'The stem is now solid and buttresses more developed'.

Two copies of the offprint of an article published in Thompson Yates & Johnston Laboratories Report, V (1903), 187-89.

101 x 79 mm. A view showing frog's nest on the upper side of the leaf. The caption on the reverse of the print reads 'Eggs hatched in mass of white froth high above streams. The frothy mass is their means of protection. When tadpoles sufficiently developed they fall off into the water beneath'.

94 x 76 mm. A view showing frog's nest on the upper side of the leaf. The caption on the reverse of the print reads 'Eggs hatched in mass of white froth high above streams. The frothy mass is their means of protection. When tadpoles sufficiently developed they fall off into the water beneath'.

77 x 97 mm. A view showing twelve year old trees growing in the Botanical Gardens at Victoria, Cameroons.

103 x 75 mm. A view showing a European standing among a block of young rubber plants.

100 x 77 mm. A view showing two-and-a-half year old rubber trees interplanted with bananas.

The diary (circa 80 pages) describes Christy's journey from London to Uganda, and his first tours of inspection for the Sleeping Sickness Commission. It also includes some zoological observations.

The diary (circa 80 pages) describes Christy's tours of inspection for the Sleeping Sickness Commission and includes some zoological observations.

The diary (circa 80 pages) describes Christy's tours of inspection for the Sleeping Sickness Commission and includes some zoological observations.

The diary (circa 80 pages) describes Christy's tours of inspection for the Sleeping Sickness Commission and includes some zoological observations.

The diary (circa 55 pages) includes a brief chronological and geographic summary of the results of Christy's tours of inspection for the Sleeping Sickness Commission.

Copies of letters (circa 120 leaves) written by Christy to the Uganda and East Africa Exploration Syndicate. It had despatched him on a prospecting mission to locate forests rich in the Funtumia elastica tree, which was used for the production of rubber. Some of the letters include summaries of their contents in the margins.

Approximately 300 x 87 mm. An uncaptioned view of dramatic coastal scenery of (probably) Madeira taken during Christy's visit of 1909, although the view could equally well have been taken in Scotland or Wales. Photograph presumably by Christy.

Approximately 300 x 87 mm. An uncaptioned view of dramatic coastal scenery of (probably) Madeira taken during Christy's visit of 1909, although the view could equally well have been taken in Scotland or Wales. Photograph presumably by Christy.

Approximately 300 x 87 mm. An uncaptioned view of dramatic coastal scenery of (probably) Madeira taken during Christy's visit of 1909, although the view could equally well have been taken in Scotland or Wales. Photograph presumably by Christy.

Approximately 300 x 87 mm. An uncaptioned view of dramatic coastal scenery of (probably) Madeira taken during Christy's visit of 1909, although the view could equally well have been taken in Scotland or Wales. Photograph presumably by Christy.