This is a wonderful vintage St. Pats' Post Card from 1910. The artist is well known Ellen Clapsaddle whom I have featured before. She has a very lovely drawing style where she captures the charm of her posers in utter delight. This fellow is wearing his greens for the day and accompanied by a delightful poem.
The file can be accessed by right clicking on it. Choose: Open link in a new tab, then left click on the image. This will enlarge it. Then right click on the enlarged image and choose: Save image as. Then just save where you want.