Sierra Leone. 1943. Envelope addressed to Detroit, Mich. bearing SG 190a, 1 1/2d purple (pair) tied by Freetown/ Sierra Leone double ring '20th Aug' with 'Opened by Examiner QQ/23' censor tape tied by framed 'Returned To Sender/ Contrary To Censorship/ Regulations/ 4' . Unique item of censorship from Sierra Leone, Seen in Post Office Records this the discovery example used on cover. Ex. Dan Mayo.