Detective Drosnin tried arranging the letters in Ms. Gray's email the way she described arranging the
kids at her school, into rows of twenty one. Then he took a look at the second column like she suggested:

t H i s m o r n i n g i t r i e d a f u n
n E w s e a t i n g s t y l e f o r t h e
k I d s d u r i n g t h e m o r n i n g a
s S e m b l y i h e l p e d a r r a n g e
t H e m i n t o r o w s o f t w e n t y o
n E t h e k i d s d i d n t c a r e b u t
i R e a l l y l o v e d i t i l i k e d t
h E s e c o n d c o l u m n t h e b e s t

No wonder she didn't invite him in!