Bushe and Shelley had visited Bechuanaland the previous year, but had got lost, and were arrested by the Transvaal authorities, who were apparently trying to stop others from visiting Lake Ngami. On the 1851 trip they were more successful.
Bushe and Shelley's 1850 visit to Bechuanaland was unsuccessful due to getting lost and being arrested by the Transvaal authorities, who were attempting to prevent others from visiting Lake Ngami. In 1851, their trip was more successful.