He'd bought along what he thought was a toy corgi to offer the 85-year-old royal.
But as a renowned expert on the breed, the royal matriarch had to set him right on that score – though she did do so with a grandmotherly smile that showed her appreciation for his efforts.
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When the Queen and Prince Philip touched down in Canberra, they were given a wonderful reception headed by Prime Minister Julia Gillard.
This tour – her 16th as Australia's head of state – will include a tram ride through Melbourne, a boat trip up the Brisbane River and a barbecue.
The Queen will also recognise the country's servicemen and women and meet paramedics and firefighters, who helped deal with the Brisbane floods this year.
Her 11-day trip concludes with a gathering of the Commonwealth leaders in Perth.
In pictures: Six decades of memories from royal tours Down Under