It was in this sense that I spoke of "climate," etc., possibly producing without selection a hooked seed, or any not great variation.

(135/5.

This statement probably occurs in a letter, and not in Darwin's published works.) I have for years and years been fighting with myself not to attribute too much to Natural Selection--to attribute something to direct action of conditions; and perhaps I have too much conquered my tendency to lay hardly any stress on conditions of life.
I am not shaken about "saltus" (135/6.

Sir Joseph had written, March 17th, 1862: "Huxley is rather disposed to think you have overlooked saltus, but I am not sure that he is right--saltus quoad individuals is not saltus quoad species--as I pointed out in the Begonia case, though perhaps that was rather special pleading in the present state of science." For the Begonia case, see "Life and Letters," II., page 275, also letter 110, page 166.), I did not write without going pretty carefully into all the cases of normal structure in animals resembling monstrosities which appear per saltus.
LETTER 136.

TO J.D.HOOKER.