Sudan. (Great Britain). 1931. Envelope from the National Bank of Egypt, Khartoum addressed to Wau (Sudan) bearing SG 41, 5m olive and black tied by Khartoum date stamp '23rd April 31' with Wau arrival '3rd June,, underpaid with framed 'T' hand-stamp and returned to Khartoum, forwarded to London with Khartoum dipatch '30th June' and London roller 'Jul 13', re-directed to Albrighton with hand-struck '1/2d/ F.B. B' and bearing Great Britain postage due SG D10, 1/2d green applied and tied by Albrighton date stamp 'Jy 14.'