In another letter to his daughter, written January 15, 1802, he says that he returned to Brompton on December 20, and that he was three months on the Continent and seven weeks of the time in Paris. He spoke of his intention to enjoy again the delights of the French capital on his way, in the course of the summer, to Munich and to get excused from any longer residence at Munich. The Elector continued friendly to him, and had lately written to him a very gracious letter, in which he expresses his pleasure at the cordiality extended towards Rumford in France, and advises him to cultivate an acquaintance with a certain lady there, who, among other attractions, was said to have great wealth. When he made this second visit to Paris, the Count accepted an invitation which he had received to stay with the Bavarian ambassador. Before he left England again, May 9, 1802, he published the third volume of his essays. His tenth essay was on ‘Kitchen Fire-Places and Utensils;’ his eleventh on ‘Chimney Fire-Places.’ His twelfth on the ‘Salubrity of Warm Rooms in Cold Weather;’ his thirteenth on the ‘Salubrity of Bathing and the Construction of Warm Baths.’ His fourteenth consisted of ‘Supplementary Observations on the Management of Fires;’ his fifteenth was on the ‘Use of Steam for Transporting Heat.’ In May 1802 he also published a volume of his philosophical papers, with a dedication to his Most Serene Highness Maximilian Joseph, Elector Palatine of Bavaria. In this he says he must ever feel himself greatly indebted to his Most Serene Electoral Highness for the kind assurances you gave me of your esteem, protection, and friendship on your succeeding to your present Bavarian dominions on the death of your late uncle, my kind friend and benefactor; but I am bound to you still more, if it be possible, by the flattering invitation you have lately given me to come to you and reside at your Court and assist in the local work of carrying into execution the vast plans you have formed for promoting the prosperity of your subjects. From Brompton, May 6, 1802, he writes to his daughter: ‘In three days I shall set out for Dover, on my way to Paris, where I expect to stay four or five weeks, and then to proceed to Munich.’ He sent by way of Holland two carriages and much baggage. On May 20 Sir C. Blagden wrote from Paris to Sir Joseph Banks: ‘Count Rumford arrived here last Friday (the 14th) in remarkably good health. Travelling agrees with him, and he seems very happy. We purpose to set out for Bavaria before the middle of next month.’ Writing to his daughter, June 25, Rumford says: ‘I did not propose to stay here long, but the Elector has written commissioning me to transact some business for him of a political nature in which he is much interested.’