« France exports wine, spirits, clothing and luxury goods to a very small Norwegian market. From 1830 onwards, it began importing Norwegian timber in relatively large quantities: it became Norway's third largest customer, purchasing one-fifth of its timber exports in 1859. During the 1860s, France also increased its imports of salted fish from Norway."
Source: ‘Norway and France at the turn of the 20th century’ ed. OpenEditions books p 97-107
Given the frequent stops in Bordeaux and Libourne, it is likely that the schooner was carrying wine and was due to return loaded with timber or fish... Another hypothesis is that it was transporting salt, which was used to preserve fish... The answer may lie in the documents of the priest of Klepp…
