I discovered I had read one more Saul Bellow novel,  making it three in all.
Mr Sammler’s Planet was the third book. I don’t remember anything about it except the title and the old European Jew Sammler’s confrontation with a black American pickpocket. I remembered that only when I went  through the New York Times website which interestingly published the Times’ original reviews of Bellow’s books.
I did not like Henderson the Rain King. Neither did the Times’ reviewer when the book appeared in 1959. He found it both dismal and fantastical. So did I. 
Herzog on the other hand was acclaimed as a masterpiece when it came out in 1964. Mr Sammler’s Planet also appeared to a favourable review in the Times in 1970 though some voices elsewhere expressed disappointment.