Palghat, or Palakkad, in Kerala is famous, as the former chief election commissioner T.N. Seshan once said, for “cooks, crooks, civil servants”. And Carnatic musicians. And cartoonists. The landlocked town with exactly two landmarks has produced four top-class political cartoonists for New Delhi’s newspapers: P.K.S. Kutty, O.V. Vijayan, Ravi Shankar, and E.P. Unny. In the…