Sound mind and memory
Defined in 2 dictionaries — Ballentine's (1916), Bouvier (1914)
Ballentine's Law Dictionary
James A. Ballentine · 1916
Sufficient mental capacity to make one’s will. See 183 111. 269, 55 N. E. 671.
Bouvier's Law Dictionary and Concise Encyclopedia
John Bouvier; revised by Francis Rawle · 1914
This phrase does not mean a mind without a flaw\ or a memory without a fault. In re Blair, 10 N. Y. Supp. 874. See Will.