Philip ROBINSON, Richard Maurice Robinson, and Gwendolyn Robinson McKeown, Plaintiffs, v. Grace Maney SPIRES, Individually and as Trustee under the W.N. Horton and E.L. Horton Trust dated May 5, 1951, and Margaret Maney Clarke, Individually and as acting Trustee under the W.N. Horton and E.L. Horton Trust dated May 5, 1951; and William W. Clarke, Individually and as acting Trustee under the W.N. Horton and E.L. Horton Trust dated May 5, 1951, Defendants.