Figure 1  Abbreviated pedigree of the family. Of the founders in generation I, I:2 was English, and I:1 and I:3 both Maori; “marrying-in” spouses in generations II and III were also Maori. Cousin marriages are shown as double lines. The siblings diagnosed with autosomal recessive spastic ataxia of Charlevoix and Saguenay (ARSACS) are V:11 and V:12 (filled symbols). The siblings V:1 and V:2 (grey symbols) are suspected, but not proven, to have had the same condition. Crossed symbols indicate deceased individuals.