Medusa. (OCLC #938622762)

This title has a collective title, but also contains two individual works (previously published separately) by different authors. The collective title and the titles of the individual works are present on the title page. ISBD describes this case, and says to choose the collective title as the title proper, and that titles of individual works may be given in Area 7. I followed that instruction:

245 10 ǂa Medusa.
505 00 ǂt Narrative of a voyage to Senegal in 1816 / ǂr J. B.
    Henry Savigny & Alexander Correard -- ǂt The sufferings of
    the Picard family after the shipwreck of the Medusa / ǂr
    Charlotte-Adélaïde Dard [née Picard] ; translated 
    by Patrick Maxwell.

I also included authorized access points as analytical entries for the two works:

700 12 ǂa Savigny, Jean Baptiste Henri, ǂd 1793-1843.
    ǂt Naufrage de la frigate la Méduse. ǂl English.
700 12 ǂa Dard, Charlotte-Adelaïde. ǂt Chaumière africain.
    ǂl English.

I also liked the classification of this piece:

    G530.M5 S3313 2008

G530 is for individual accounts of shipwrecks including sailors’ yarns; for special vessels, cutter by the name of the vessel!