Scores and Parts
||Manuscript, n.d. (between 1790 and 1810).
This item forms part of the
Ricasoli Collection at the University of Louisville Music Library. File 8 is cellos, not contrabassi. "Bassi" could mean a number of things in the Classical period - cellos, ripieni celli, contrabassi, continuo, etc.; here it fairly clearly means cellos. The tessitura of the "Bassi" part in section 5, in particular, goes below the low E of the contrabass (which I believe has been fairly constant) and this by itself suggests a cello part!
||Litanie della B.V.
|Opus/Catalogue NumberOp./Cat. No.
||"per uso della Cappella dell'Ill:mo Sig:re Cavire Leopoldo Ricasoli Zanchini Da Castiglionchio"
||tenor, bass, chorus (T,B,) strings, organ (or continuo)
A one-line bass organ part is in fact how the basso continuo idea (the "continuous bass"; continuo is an adjective, not a noun) started (Taruskin from "Oxford History of Western Music".) The ♯ under the bass part in line 11 reinforces that this is probably organ (or) continuo, not organ specifically, despite notation.