Adele and Simon in America by Barbara McClintock

From chapters.ca:
Adele and her younger brother, Simon, have just arrived in New York City to visit their Aunt Cecile and prepare for a grand train trip around America. "Please try not to lose anything on our trip," Adele tells her brother with a sigh. But how can Simon remember to keep an eye on his belongings when there are so many wonderful distractions and astounding sights to take in? The endearing team from
Adele & Simon returns in a cross continental adventure that reflects the vitality of early twentieth- century America, from the Boston Public Garden to San Francisco's Chinatown. Stunning pen- and- ink - and water colour illustrations are filled with innumerable hidden treasures, and end papers featuring a period map of America extend the fun.