I have been looking into this 1863 batch also. Interestingly they are listed on Miramar as 1533grt iron tugs for British owners names "No.1"-"No.8", and Samuelson Yd No 69-76 (are those numbers documented or assumes, I wonder). But we know from contemporary reports that they were for France and that one launched on 29/10/1863 was named SOLFERINO. Samuelson launched four vessels on that day, which was also the day that Earl de Grey and Ripon was inaugurated as Lord High Steward of Hull.
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"General and concise history and description of the town and port of Kingston-upon-Hull"
http://archive.org/stream/generalconcis ... a_djvu.txt* The first vessel launched was christened, by Miss A. A. Croome, the Countess of
Ripon. She is a splendid ship, of above 1,200 tons register, and is intended to be an
East Indiaman. The next in order was the Lightning, christened by Miss Bannister,
and to be fitted precisely like the former ship, for the same trade. The third vessel
that left the stocks was christened, by Miss Moss, the Earl de Grey and Ripon. She
is a screw steamer, and will have engines of 90 horse power. Her tonnage, O.M., is
789. The last vessel launched was a tug, one of eight, built for a French company,
to trade between Rouen and Paris. She was christened by Miss M. Samuelson the
Solferino. She has two screws, her engines are of fifty horse power, and her tonnage,
O.M., is 247 tons. All the vessels were launched by the new guillotine system, an
ingenious and simple process used in the Portsmouth and other dockyards. The
launches were perfect. The splendid vessels glided into their future element mag-
nificently and majestically, amidst the cheers of the assembled thousands.
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But i have failed so far to find any refernce to these vessels in French sources. But will look at the London register books at Kew when I can as the last two were registered there as:
ON 48691 - NO SEVEN
ON 48692 - NO EIGHT
i must have seen these in the books before but not identified them as tugs.
[edit] And we now have confirmation that they were also "toueurs" (warping tugs) and built for Eugene Godeaux & Cie, via B Fothergill. Godeaux was the engineer who laid the chain system used by the earlier batch of toueurs built in 1855-57. Noted that the 26/6/1863 report doesn't name the tug.