Table 1.

Summary of ancient sequence data from both parchment samples.

sample	raw reads	aligned reads raw (%)	aligned reads high qualitya (%)	aligned reads mtDNA	ovine 50K panel SNPs called
PA1 (seventeenth century)	17 006 629	11 292 116 (66.4)	6 047 847 (35.5)	11 271	3168
PA2 (eighteenth century)	31 493 502	14 403 079 (45.7)	5 256 723 (16.7)	14 043	2291

^aHigh quality reads consists of a mapping quality greater than or equal to 30, no reads which also align to the human genome (hg19) and unique as described by the XT and X1 tags of the BWA mapping algorithm.