An Australian grammar : comprehending the principles and natural rules of the language, as spoken by the Aborigines in the vicinity of Hunter's River, Lake Macquarie, &c. New South Wales is a book written by Lancelot Edward Threlkeld and published in Sydney in 1834.

In 1892 a revised and much expanded version was published by ethnologist John Fraser, as An Australian Language as Spoken by the Awabakal..., in which he and other contributors added much text, several appendices, and a map of the tribes of New South Wales as frontispiece.

An Australian grammar : comprehending the principles and natural rules of the language, as spoken by the Aborigines in the vicinity of Hunter's River, Lake Macquarie, &c. New South Wales (1834), by English missionary Lancelot Threlkeld, is a description of what is now referred to as the Awabakal language, spoken by people in the Hunter Valley and Lake Macquarie regions of New South Wales, Australia.

[3] In the preface, Fraser writes: "...but we have now come to know that this dialect was essentially the same as that spoken by the sub-tribes occupying the land where Sydney now stands, and that they all formed part of one great tribe, the Kuriggai".

Norman Tindale (1974) later wrote that there was such a "literary need for major groupings that [Fraser] set out to provide them for New South Wales, coining entirely artificial terms for his 'Great tribes'.