British snow ORB, 255/260 tons (old/new measurement), was built at Sunderland in 1844. The annual volumes of Lloyd's Register of Shipping for 1845/46-1852/53 contain the following information:

Master:
     1845/46-1849/50 - Routledge
     1850/51-1852/53 - Rickley

Owner:  T. Tiffin

Port of registry:  Sunderland

Port of survey:  Sunderland

Destined voyage:
     1845/46-1849/50 - Quebec
     1850/51-1852/53 - [not given]

The ORB last appears in Lloyd's Register for 1852/53.

The British bark ORELIA, 382 tons, was built on Prince Edward Island in 1825. She was not a vessel of the first class, as her hulk was rated only E 1. The surnames of the master and the owner are identical (Rowland), and if she was indeed owned by her master she was the early 19th-century equivalent to a free-lance big-rig truck. She was registered at Plymouth, and her destined voyages were to Quebec (Lloyd's Register of Shipping for 1834/35 and 1835/36) and to North America (Lloyd's Register for 1836/37 and 1837/38). Whether this vessel is the source of the wood for the houses on Orelia Terrance, Cobh, I do not know: from the entries in Lloyd's Register she does not appear to have sailed anywhere near the Irish coast, but as a transient sailer she may have engaged in English-Irish coastal trade as well as longer trans-Atlantic voyages. In any case, I think that this question would be best answered by someone local to Cobh. If you have not already done so, you might wish to check the two standard works on Cobh:

1. Mary Broderick, History of Cobh (Queenstown), Ireland (2nd ed.; Cork: Mary Broderick, 1994).
2. Joe Wilson, Cob now and then; a photographic journey (Blarney, Co. Cork: On Stream, 1993).

The Bremen bark ORESTES was built at Motzen, on the Weser River, by the shipbuilding firm of D[iedrich] Oltmann W[itt]we, for Friedrich Wilhelm Lüpking of Bremen, and was launched early in February 1853. 146 Commerzlasten; 34,1 x 8,1 x 4,2 meters (length x beam x depth of hold). 10 Aprl 1853, maiden voyage, Bremerhaven-New York, under N. Dannemann. In 1856, the ORESTES was sold, passing eventually to E. W. Hallensleben (5/6) and Gebr. Bornemann (1/6); G. Günther became her master. In the early 1860's, the ORESTES was sold in Siam (Thailand). The Wochenschrift für Vegesack und Umgegend for 16 April 1862 reported that

The first vessel under the Siamese flag - white elephant on a red field - from Bangkok, arrived at Hamburg in the last week of March. She is the bark ORESTES, Capt. Cummings, which has been purchased by the Siamese government, and whose crew includes several Siamese.

It is possible that the vessel was renamed PRINCESS SERAPHI. Nothing is known of her later history or ultimate fate.

Source: Peter-Michael Pawlik, Von der Weser in die Welt; Die Geschichte der Segelschiffe von Weser und Lesum und ihrer Bauwerften 1770 bis 1893, Schriften des Deutschen Schiffahrtsmuseums, Bd. 33 (Hamburg: Kabel, c1993), p. 446, no. 52.

The U.S. ship ORLEANS was built at New York by Christian Bergh in 1833, for the Holmes Line of coastal sailing packets between New York and New Orleans. 599 tons; 127 ft 3 in x 32 ft 6 in x 16 ft 3 in (length x beam x depth of hold). She sailed in the Holmes line from 1833 to 1847, during which time her passage from New York to New Orleans averaged 17.1 days, her short passage being 11 days, her longest 25 days.

On 30 October 1847, the ORLEANS was purchased from Barrett & Sears, of New York, for $15,000, by the Hamburg shipowner Robert Miles Sloman, who renamed her HERSCHEL, and placed her in the North Atlantic trade, carring emigrants to New York or New Orleans and returning to Europe with a cargo of tobacco or cotton.

Masters:
     1847-1852 - J. C. Wienholtz
     1852-1853 - J. H. Jacobs
     1853-1855 - J. E. Meier
     1855-1856 - O. P. Nielsen
     1856      - P. Foppes
     1856-1859 - C. Hauschild

Voyages:
     1847/48   - from New York/New Orleans
     1848/49   - New York/intermediate ports/New York
     1850      - New York
     1850/51   - New York
     1851      - New York (2 x)
     1852      - New York
     1852      - Quebec
     1852/53   - New York
     1853      - New York
     1853/54   - New York/Charleston
     1854      - New York
     1854/55   - New York
     1855      - New York
     1855/56   - New Orleans
     1856      - Quebec/London
     1856-1859 - New York/intermediate ports

The HERSCHEL ex ORLEANS was sold in Surabaja, on Java, Dutch East Indies (now Indonesia), in 1859, for 20,000 fl. Her later history and ultimate fate are not known.

Sources: Robert Greenhalgh Albion, Square-riggers on Schedule; The New York Sailing Packets to England, France, and the Cotton Ports (Princeton: Princeton University Press, 1938), pp. 292-293; Ernst Hieke, Rob. M.Sloman Jr., errichtet 1793, Veröffentlichungen der Wirtschaftsgeschichtlichen Forschungsstelle e.V., Hamburg, Band 30 (Hamburg: Verlag Hanseatischer Merkur, 1968), p. 372; Walter Kresse, ed., Seeschiffs-Verzeichnis der Hamburger Reedereien, 1824-1888, Mitteilungen aus dem Museum für Hamburgische Geschichte, N. F., Bd. 5 (Hamburg: Museum für Hamburgische Geschichte, 1969), vol. 2, p. 208.

The Bremen ship ORPHEUS was built at Burg (now Bremen-Burg) by J. H. Bosse, and launched on 4 April 1854. 261 Commerzlasten / 588 tons register; 42,5 x 9,5 x 5,2 meters (length x beam x depth of hold). Original owners: Konitzky & Thiermann, Bremen, operators (1/3); Georg C. Mecke & Co, Bremen (1/2); and the captain, Diedrich Schilling (1/6). She was employed in the emigration trade to North America, and was known as a fast vessel: in December 1854, the ORPHEUS sailed from New York to Bremerhaven in the hitherto unheard of time of 18 days 6 hours.

Schilling was succeeded as captain in 1857 by Johann Philipp Wessels, who in 1862 also acquired Schilling's 1/6 share in the vessel. In 1862, Ferdinand Wessels appears as master, although possibly only as a substitute, since Johann Philipp Wessels was again captain of the ORPHEUS in 1863.

In May 1865, the cargo of the ORPHEUS on its return voyage from New York to Bremerhaven included a dozen alligators, destined for the zoological gardens in Köln and Dresden. The next voyage of the ORPHEUS was a race, roundtrip from Bremerhaven to New York and back, with the Bremen bark GUTENBERG, Capt. Hinrich Raschen, the wager being 500 Thaler; the race was won by the GUTENBERG.

In the night of 17/18 November 1865, the ORPHEUS, bound from Hamburg to New York with emigrants, collided in the vicinity of North Sand Head (in the English Channel) with the British schooner MARIA, from Scarborough, which sank; although the captain of the schooner was able to save himself, his wife and the 3 members of the crew were drowned.

In 1868, the ORPHEUS was re-rigged as a bark. On 2 November of that year, Kautzner, master, she sailed from Baltimore for Amsterdam with a cargo of tobacco, but early in December was stranded near Texel. The cargo was removed in lighters, and the vessel refloated, and towed to Nieuwe Diep. Shortly afterwards, the ORPHEUS was sold to M. Peterson & Sön, Moss, Norway, and from this time on sailed under the Norwegian flag, although retaining her old name. Her new captain was M. Bruusgaard. On 15 October 1877, on a voyage from Husom to London with a cargo of wood, the ORPHEUS was abandoned by her crew on Dogger Bank. On 19 October, the abandoned vessel was spotted approximately 100 miles from Cuxhaven by the Hamburg steamer UHLENHORST, which towed her to that port, whence on 22 October she was taken in tow by the steamers GRAF MOLTKE, GERMANIA, and COWPEN to Hamburg.

Source: Peter-Michael Pawlik, Von der Weser in die Welt; Die Geschichte der Segelschiffe von Weser und Lesum und ihrer Bauwerften 1770 bis 1893, Schriften des Deutschen Schiffahrtsmuseums, Bd. 33 (Hamburg: Kabel, c1993), pp. 390-392, no. 91.