  I discuss the problem of secular inequalities in Kepler by giving account of
a manuscript note that has not been published until 1860. In his note Kepler
points out the need for a model, clearly inspired by the method of epicycles,
that describes the secular inequalities as periodic ones. I bring attention to
this point, that seems to have been underestimated, since the references to
Kepler's work usually report only that he observed a decreasing mean motion for
Saturn and an increasing one for Jupiter.
