South Africa 1937 Mrs Bonney's Solo Brisbane - Cape En-Route

SA: 1937 MRS BONNEY'S SOLO FLIGHT BRISBANE - CAPE TOWN: Cover carried and SIGNED BY MRS H B BONNEY franked Australian adhesives totalling 5d tied Brisbane Air-Mail cancel 11 APR. Also bears rectangular violet flight cachet. This cover was mailed FROM EN-ROUTE STOP AGRA, INDIA where Indian adhesives affixed (Agra cds 8 MAY 37). Brisbane arrival cds. VF, scarce intermediate stage letter.