1. A Voyage to the Centre of the Earth
2. Captain Hatteras; or, the English at the North Pole
3. The Frozen Desert
4. Round the World in Eighty Days
5. Five Weeks in a Balloon
6. At the Bottom of the Deep, Deep Sea (wouldn't it be fun to see 20k titled that!, but not seen!)
7. A Journey to the Moon and Round Aboout It.
8. Three Englishmen against Three Russians

And the ad announces "The Remainder of Jules Verne's Books will be published during the ensuing months."

The column "Received during the Month" indicates that Round the World in Eighty Days was published in February, 1876

As shown above, in March 1876, it is announced that Sampson Low & Co own the copyright to Around the World in Eighty Days and Weldon & Co have been required to withdraw their publication from sale. Weldon is also required to withdraw their announcement and publication of The Adventures of Three Russians and Three Englishmen which is also under the copyright of sampson Low! As well, the note in the ad shown higher up stating: "The Remainder of Jules Verne's Books will be published during the ensuing months" has to be amended to say "with the exception of those the Copyright of which belongs to Messrs Sampson Low & Co."

This below ad in a Weldon book, no longer lists Round the World in Eighty Days, which WAS number 4 in the above ad! So books with this catalogue must be Mar 1876 or after. (Round the world in Eighty Days published February 1876, and copyright infringement noted in March 1876) (but why the ad still says Weldon instead of Goubaud, I am unsure!)

An ad in The Bookseller, May 3, 1876 by Goubaud and Son, announces The Boy's Bookshelf, in handsome stiff wrapper, priced 9d:
Verne's Voyage to the Centre of the Earth and Verne's Five Weeks in a Balloon... to be followed by other Volumes of Jules Verne !

There is a lot of conflicting information around this time:
A listing in the Supplement to the The Bookseller, No. CCXXI, April 4, 1876, lists: Five Weeks in a Balloon (Boys' Bookshelf) 222 pgs, Weldon, 9d and just below that, Voyage to the Centre of the Earth, Goubaud, 9d

The following are the observed Weldon & Company publications

AND Books seen with the Goubaud and Son imprint include:

Addresses of the firm

Weldon and Co.:

• September 1875 - Dec 1876 (at least)- 15 Wine Office-Court, E.C., London
  aka Wine Office Court, E.C.
• overlapping above!
  December 1875 - 40 Bedford Street, Covent Garden, London
• December 1876 - 15 Wine Office-Court, E.C., London

Goubaud and Son:

• April 26, 1876 - 39 and 40, Bedford-street, Covent-garden, London
  aka 40 Bedford St., Covent Garden, London (only (?) in their Jules Verne publications!)

Images and information provied by Philip Hollaway