Mr.Torbitt was engaged in trying to produce by methodical selection and cross-fertilisation a fungus-proof race of the potato.

The plan is fully described in the "Life and Letters," III., page 348.
The following letter is given in additional illustration of the keen interest Mr.Darwin took in the project.) Down, Monday, March 4th, 1878.
I have nothing good to report.

Mr.Caird called upon me yesterday; both he and Mr.Farrer (284/2.

The late Lord Farrer.) have been most energetic and obliging.

There is no use in thinking about the Agricultural Society.