This paper is based on data gathered during treatment of six boats which were discovered in the city of Québec. Trial freeze-drying, following pretreatment with PEG 400, was conducted during the winter of 1986 with inconclusive results. Preliminary results of a subsequent experiment (winter 1987) appear to be much more promising, and demonstrate a correlation between the daily percentage loss in weight, and the ambient conditions, particularly in reference to the amount of sunshine, and the wind velocity. -- AATA