Stamps engraved by Herbert Bourne

am NOT a specialist in postage stamps, so I can use any amount of help you can provide.

While I have found references to stamps of several other countries reportedly engraved by Herbert Bourne, references were shaky. These are the only stamps where I found reasonable proof of Bourne's contributions.

Postage stamps, Chile
"Cabezones" showing Columbus
1900
printed by Waterlow & Sons
Rarity = 1

Postage stamps, Falkland Islands
"Queen Victoria"
1878 and after
printed by Bradbury, Wilkinson & Co
Rarity = 1

Postage stamps, Queensland
"Queen Victoria"
printed by Bradbury, Wilkinson & Co and others
Rarity = 1

(the master die proof at top left sold for over $12,000 in Australia, early 2009)