104 



Life and Letters of Francis Galton 



given, in each case for the purpose of distinguishing couples with the same 

 names. The following is a slightly modified reproduction of Galton's illustra- 

 tion. The whole "index pedigree" will of course have an index, the main 

 family group of any individual and the family group founded by him being 

 recorded. For example we look up Frank Gore in this index and find against 

 his name 205, 340. The latter entry will give his birthday and confirm that 



Family Group*. 



* Slightly modified from Galton's form. Letters to individual numbers need only be 

 attached when there are no names. 



he is the man we are seeking. It will give us information as to all his children 

 and by reference to the number in the last column on the right we can find 

 out the characteristics of his grandchildren and so on to lower descendants. 

 By reference to the other number 205, we find the full particulars of all his 

 brothers and sisters, and can trace by the numbers 344, 370, 315 all his 

 nephews and nieces, and then upwards to their ancestors or downwards to 

 their descendants. The family numbers 101 and 144 lead us to the particulars 

 of his father and mother, and to those of all his paternal and maternal uncles 

 and aunts respectively. 101 and 144 also give us the family group numbers 

 of his paternal grandparents. The numbers 211, 207 and 223 will enable us 

 to find all his paternal, while 315 will give us his maternal cousins. 340 will 

 lead us to his half-brothers and sisters. 



