There were four impressions of the First Edition, all featuring Thror's Map and the Map of Wilderland on the endpapers, together with the original version of the encounter with Gollum. 1st Impression 1937 – Includes the standard eight black and white illustrations plus The Hill and Mirkwood. No colour illustrations. 1.488 copies bound. An additional 21 copies were bound in paper covers - review copies? 2nd Impression 1937 – Includes four colour illustrations in addition to the standard eight black and white illustrations - the black and white illustrations of The Hill and Mirkwood were removed from this and later printings. 1,900 copies bound. An additional 423 unbound copies were destroyed in a warehouse fire in November 1940. ["[A] reprint was needed before Christmas". Allen & Unwin used four of five colour illustrations prepared by Tolkien for Houghton Mifflin (below), with no increase in price] 3rd Impression 1942 – Includes a colour frontispiece in addition to the standard eight black and white illustrations. This was a cheaper edition produced to the Book Production War Economy Standard. 1.509 copies bound. 4th Impression 1946 - Similar to the 3rd Impression. 4,032 copies bound. The Standard Eight Black & White Illustrations Many editions include a series of eight black and white illustrations - In some editions these have been coloured by H.E. Riddett.

• The Trolls
• The Mountain-path
• The Misty Mountains looking West
• Beorn's Hall
• The Elvenking's Gate
• Lake Town
• The Front Gate
• The Hall at Bag-End

Colour Illustrations When there is only a colour frontispiece present the illustration is The Hill: Hobbiton-across-the Water. Prior to 1974 some editions included four colour illustrations. These were:

• The Hill: Hobbiton-across-the Water
• Rivendell
• Bilbo comes to the Huts of the Raft-elves
• Conversation with Smaug

[Tolkien completed five colour illustrations of the novel in 1937 for its US publisher Houghton Mifflin. The other, third in narrative sequence, illustrated the eagle's eyrie, namely:

• Bilbo awoke with the sun in his eyes

Source: The Annotated Hobbit]