Until the early 19th century, Australia was best known as New Holland, a name first applied by the Dutch explorer Abel Tasman in 1644 (as Nieuw-Holland) and subsequently anglicised. Terra Australis still saw occasional usage, such as in scientific texts.[N 6] The name Australia was popularised by the explorer Matthew Flinders, who said it was "more agreeable to the ear, and an assimilation to the names of the other great portions of the Earth".[54] The first time that Australia appears to have been officially used was in April 1817, when Governor Lachlan Macquarie acknowledged the receipt of Flinders' charts of Australia from Lord Bathurst.[55] In December 1817, Macquarie recommended to the Colonial Office that it be formally adopted.[56] In 1824, the Admiralty agreed that the continent should be known officially by that name.[57] The first official published use of the new name came with the publication in 1830 of The Australia Directory by the Hydrographic Office.[58]