three men in a boat - why was Harris very eager to see Mrs. Thomas ' tomb while the narrator didn't like to see the same ?

Harris was eager to see the "funny tomb," whereas, the narrator has no interest in damp churches or tombstones.

"I never did seem to hanker after tombstones myself. I know that the proper thing to do, when you get to a village or town, is to rush off to the churchyard, and enjoy the graves; but it is a recreation that I always deny myself. I take no interest in creeping round dim and chilly churches behind wheezy old men, and reading epitaphs. Not even the sight of a bit of cracked brass let into a stone affords me what I call real happiness."