PERSISTENCE 89 Evidence available 89 About thirty-five points of reference in each print 90 Photo-enlargement; orientation; tracing axes of ridges 90-91 Ambiguities in minutiae 91 V. H. Hd. as child and boy, a solitary change in one of the minutiae 92 Eight couplets from other persons 93 One from Sir W. G. 95 Summary of 389 comparisons 96 Ball of a thumb 96 Results as to persistence 97 CHAPTER VII EVIDENTIAL VALUE 100 Method of rough comparison 100 Chance against guessing a pattern 101 Number of independent elements in a print--squares respectively of one, six, and five ridge-intervals in side 101-103 Interpolation, three methods of 103-105 Local accidents inside square 107 Uncertainties outside it 109 Compound results 110 Effect of failure in one, two, or more prints 111 Final conclusions--Jezebel 112-113 CHAPTER VIII PECULIARITIES OF THE DIGITS 114 Frequency per cent of arches, loops, and whorls generally, and on the several digits 114-115 Characteristic groups of digits 116-118 Relationships between the digits 119 Centesimal scale of relationship 124-126 Digits of same and of different names 130 CHAPTER IX METHODS OF INDEXING 131 Use of an index 131 Method of few conspicuous differences in many fingers 131 Specimen index 133 Order in which the digits are noted 134 Examples of indexing 135 Effect of regarding slopes 135 Number of index-heads required for 100 sets in each of twelve different methods 136-138 _i_ and _o_ in forefingers only 138