Potatoe Planting

An old farmer wrote to his son who
was in prison "...I won't be able to
plant potatoes and other things this
year because I can't dig the field, I
know if you were here you would
have helped me." The son wrote back, "Dad, don't even
think of digging the field do you want
to expose me? That's where I buried
the money I stole." The police read the letter before
delivering it to the father, and the next
day the whole field was dug by police
but nothing was found. The following day the son wrote to his
father again, "Now you can plant your
potatoes Dad, your farm has been dug
for you."