From Chapter 9:
Pendennis, when he comes home the first time from Oxbridge, brings with him a large box of cigars of strange brand, which he smokes "not only about the stables and greenhouses, where they were good" for his mother's plants, and which were obviously places to which a man who wished to smoke should betake himself, but in his own study, which rather shocks his mother. Pen goes from bad to worse during his University days, and, sad to say, one Sunday in the last long vacation, the "wretched boy," instead of going to church, "was seen at the gate of the Clavering Arms smoking a cigar, in the face of the congregation as it issued from St. Mary's. There was an awful sensation in the village society. Portman prophesied Pen's ruin after that, and groaned in spirit over the rebellious young prodigal." Later the smoke from Warrington's short pipe and Pen's cigars floats through many pages of the novel.

From Chapter 14:
Blackburn, Archbishop of York, was a great smoker. On one occasion he was at St. Mary's Church, Nottingham, for a confirmation. The story of what happened was told long afterwards in a letter written in December 1773 by John Disney, rector of Swinderby, Lincolnshire, the grandson of the Mr. Disney who at the time of the Archbishop's visit to St. Mary's was incumbent of that church. This letter was addressed to James Granger, and was published in Granger's correspondence. "The anecdote which you mention," wrote the Mr. Disney of Swinderby, "is, I believe, unquestionably true. The affair happened in St. Mary's Church at Nottingham, when Archbishop Blackbourn (of York) was there on a visitation. The Archbishop had ordered some of the apparitors, or other attendants, to bring him pipes and tobacco, and some liquor into the vestry for his refreshment after the fatigue of confirmation. And this coming to Mr. Disney's ears, he forbad them being brought thither, and with a becoming spirit remonstrated with the Archbishop upon the impropriety of his conduct, at the same time telling his Grace that his vestry should not be converted into a smoking-room."