Then, on the cusp of a new science, he became botanist to Charles I. Anna Parkinson, a "distant descendant" of Parkinson and the author of a new popular biography of him, asserts that in 1625 when Charles I's bride, Henrietta Maria of France, came at the age of 15 years to live at St. James's Palace, "he took on the role of introducing the young queen to horticulturally sophisticated circles." When he summed up his experience in writing "Paradisi in Sole Paradisus Terrestris" ("Park-in-Sun's Terrestrial Paradise", 1629 – "Park-in-Sun" is a pun on "Parkinson"), with the explanatory subtitle "", it was natural that he dedicated this work, which he called his "Speaking Garden", to the queen. Blanche Henrey called the work the "earliest important treatise on horticulture published in England", while the Hunt catalogue described it as "a very complete picture of the English garden at the beginning of the seventeenth century, and in such delightful, homely, literary style that gardeners cherish it even to the present day."