THE PROBLEM OF THE FUTURE IQ 



aged 68, after a week's illness, cause unknown. He 

 married II. lo, the congenital deaf-mute daughter of 

 normal parents, I. 7, and I. 8. She had several brothers 

 and sisters, II. 11, all normal, whose children, III. 16, 

 were all normal. II. 10, had ten children. Of these, III. 5, 

 normal, died aged 17 months. III. 6, normal, died aged four 

 years. III. 7, were stillborn. III. 9, deaf-mute, married 

 three times ; by her first husband. III. 8, who was also 

 deaf-mute, she had twins, IV. 1-2, who died in infancy 

 before any knowledge of deafness ascertained. Her 

 second husband was III. 17, the deaf-mute son of deaf- 

 mute parents, II. 12 and II. 13 ; he had seven hearing 

 brothers and sisters. His grandparents, I. 8 a and 1.8 6, 

 were also deaf-mutes. By III. 17, III. 9 had three children, 

 IV, 3-5 ; IV. 3 was deaf-mute, IV. 4 normal, and IV. 5 

 died aged five months. The third husband of III. 9 

 was III. 21, a deaf-mute ' natural ', and by him she had 

 twins, IV. 7-8. IV. 7 died in infancy, IV. 8 met with 

 an accidental death, caused by the drunkenness of its 

 mother, at the age of two months. III. 10, deaf-mute 

 and alcoholic, in Inebriate Home for three years, married 

 III. II, also a deaf-mute, much older than herself, but 

 had no children. III. 12, deaf-mute, has been mentioned 

 before. III. 13, a soldier and normal, married a normal 

 wife. III. 14, and had a normal child, IV. 6. III. 15 

 was a deaf-mute imbecile unmarried. I. 11 and I. 12 were 

 normal and in good circumstances ; they had three normal 

 children, II. 14-16, but II. 16 was ruined by drink and 

 lost all his money, he married his first cousin, II. 21, 

 who was also alcoholic, but not deaf-mute ; her parents, 

 I. 13 and I. 14, and her brothers and sisters, II. 17-20, 

 and II. 22, were normal. There were five children of this 

 marriage, III. 19-23. III. 19 was normal. III. 20, still- 

 born. III. 21, a deaf-mute 'natural'. III. 22 was 

 normal but ' went wrong ', and III. 23 was normal. {Pre- 

 pared in the Eugenics Laboratory.) See Plate I, Fig. v. 



The marked persistence of defect that we have noted 

 in these stocks is not, however, any peculiarity of anti- 

 social characters. A few other pedigrees will show 

 that desirable characters are just as closely associated 



