One letter, front and back both with stamps of the Mosque of Bobo Dioulasso
And here is another one
In Bobo Dioulasso, it is the home of the Bobo's. The population of the Bobo is slightly over 100,000 people. The Bobo have lived in the western region for centuries. Some believe they have been settled in the area since as far back as 800 A.D. These individuals have their own language that we know as simply the "Bobo" language, or "Mande".
The Bobo people are an inherently decentralized group. The various villages that break down their group have their own method of organizing a "political system". They base it on the relationship among individual patrilineages. The idea of placing political power in the hands of an individual is foreign to the Bobo people. The Bobo, like most other cultures, have their own religious beliefs. The creator god of the Bobo is Wuro, who is never physically represented and cannot be described in words according to the Bobo. The god Wuro is the individual responsible for ordering all things in the world into pairs, which must always remain balanced. However, man, through everyday existence is usually responsible for upsetting this balance. The Bobo religious system involves restoring order through a series of offerings.
These are Bobo masks