Australia. (Fiji - Oceania). 1951. Envelope addressed to 'J. Percival, Executive Director, Frigate Bird 11' cancelled by 'Isla Pasca/ Chile' double ring in blue, routed via Valparaiso '26th Mar' and Oceania 'Mangareva' dated '5/4' 'bearing French Oceania 40c blue tied by Papeeta/ Ile Tahiti date stamp '11th April' routed via Fiji bearing Fiji SG 251, 1 1/2d carmine tied by Suva/Fiji date stamp '18th April with boxed cachet 'Australia - Chile/ First Experimental Air Mail/ March 13 April 21 1951' with Sydney '21st April' arrival.