Cottage at Bantry Bay / Hilda von Stockum

 This book, written in 1938, offers a vivid picture of an Ireland that has all but disappeared. The O'Sullivan family invite the reader to share their many homely adventures. Michael and Brigid brave the wilds and gypsies on an errand for their injured father and come home with a new friend; twins Liam and Francie keep everyone hopping; Mother and Father draw the family together with story-telling, warmth and humor. Then Michael and Brigid find a treasure which changes the course of things for all.Illustrated by the author.

This is the first book in the Bantry Bay Series.  The second book in the series is Francie on the Run. The third book in the series is Pegeen.