From Chapter 7:
There is no mention of Parson Trulliber's pipe, but that pig-breeder and lover can hardly have been a non-smoker. Both the other clerical characters who appear in the book, the Roman Catholic priest who makes an equivocal appearance in the eighth chapter of the third book, and Parson Barnabas, who thinks that his own sermons are at least equal to Tillotson's, smoke their pipes. The other smokers in "Joseph Andrews" are the surgeon and the exciseman who, early in the story, are found sitting in the inn kitchen with Parson Barnabas, "smoking their pipes over some syderand"—the mysterious "cup" being a mixture of cider and something spirituous—and Joseph's father, old Gaffer Andrews, who appears at the end of the story, and complains bitterly that he wants his pipe, not having had a whiff that morning.

From Chapter 10:
Mr. Furniss, in the paragraph quoted on a previous page, says: "No gentleman in those days was seen smoking even a 'weed' in the streets." The nearest approach to this seems to have been smoking on club steps. Thackeray, in the seventeenth chapter of the "Book of Snobs," speaks of dandies smoking their cigars upon the steps of "White's," most fashionable of clubs, and, in an earlier chapter, of young Ensign Famish lounging and smoking on the steps of the "Union Jack Club," with half a dozen other "young rakes of the fourth or fifth order." Two of Thackeray's own drawings in the "Book of Snobs"—in chapters three and nine—show men, one civil the other military, smoking cigars out of doors; but as these were no doubt arrant snobs, the drawings may be accepted as proof of Mr. Furniss's statement.