More on the triplet Killing potentials of quaternionic Kähler manifolds

We show the properties of the triplet Killing potentials of quaternionic Kähler manifolds which have been missing in the literature. It is done by means of the metric formula of the manifolds. We compute the triplet Killing potentials for the quaternionic Kähler manifold Sp(n+1)/((Sp(n)⊗Sp(1))) as an illustration.