The writing on the other side of the page was showing through, so fixed the problem by making the background uniformly white. From a drawing in 'Eclectic Physical Geography', Russell Hinman, 1889.
非洲動物（白色背景）
aardvark、Africa、African、animal、Animals、giraffe、gnu、gorilla、handies、hippopotamus、lion、ostrich、pangolin、remix 228765、zebra
土豚、非洲、非洲人、動物、動物、長頸鹿、GNU、大猩猩、handies、河馬、獅子、鴕鳥、穿山甲、混音228765、斑馬
資料來源：openclipart ( https://openclipart.org/ )