There is nothing in Dineley 's account of the legend of St. Patrick using the shamrock to teach the mystery of the Holy Trinity .
This story does not appear in writing anywhere until a 1726 work by the botanist Caleb Threlkeld .
There is nothing in Dineley 's account of the legend of St. Patrick using the shamrock to teach the mystery of the Holy Trinity , and this story does not appear in writing anywhere until a 1726 work by the botanist Caleb Threlkeld .