Pomatostomus temporalis -- Grey-crowned Babbler. Alternate name on piece: Pomatorhinus temporalis [Temporal pomatorhinus] The 2 birds are carefully drawn, the background sketched in. As published, the tails of the birds are wider, but this is overall a very clear layout sketch. Previously cited as GS1 or 1GS (and so marked in pencil on reverse). Artist's name(s): Gould, John; Richter, Henry Constantine.