In his early travels, William became acquainted with Robert Moffat, the man who developed the written form of the Tswana language and translated the Bible into that language.
Savos pirmajos ceļojumos pa šo zemi Viljams iepazinās ar Robertu Mofatu — cilvēku, kas izveidoja cvanu valodas rakstību un pārtulkoja šajā valodā Bībeli.