Sons and grandsons of the Emir of Katsina make a gramophone record in London for use in oriental language studies . Wakili Usuman Nogogo and Yusifu Lamba , sons of the Emir of Katsina from Nigeria together with the Emir ' s grandsons Ibrahim and Usman , visited the Linguaphone Recording studios in London and made several records for oriental language studies for the University of London . The records were made in the native language of Hausa . Photo shows ; Emir of Katsina ' s two grandsons getting to know the recording equipment . 5 May 1933