THE DATA 17 



undertaken in order to locate the point at which the 

 separation took place. Over and over, the investiga- 

 tion was laid aside in sheer despair of ever being able 

 to find absolute proofs or to establish missing links in 

 the testimony. Then some freshly discovered facts, 

 that came often quite unexpectedly, would throw new 

 light on the situation, and the work would be resumed. 

 The great-great-grandfather of Deborah 1 was Martin 

 Kallikak. 1 That we knew. We had also traced the 

 good family, before alluded to, back to an ancestor be- 

 longing to an older generation than this Martin Kalli- 

 kak, but bearing the same name. He was the father 

 of a large family. His eldest son was named Frederick, 

 but there was no son by the name of Martin. Conse- 

 quently, no connection could be made. Many months 

 later, a granddaughter of Martin revealed in a burst of 

 confidence the situation. She told us (and this was 

 afterwards fully verified) that Martin had a half brother 

 Frederick, and that Martin never had an own brother 

 "because," as she now naively expressed it, "you see, 

 his mother had him before she was married." Deeper 

 scrutiny into the life of Martin Kallikak Sr., which was 

 made possible through well-preserved family records, 

 enabled us to complete the story. 



1 All names, both Christian and sur-names, are fictitious. 

 c 



