what change has the narrator noticed in phoebe since her arrival

"Even as it was, a change grew visible; a change partly to be regretted, although whatever charm it infringed upon was repaired by another, perhaps more precious, She was not so constantly gay, but had her moods of thought, which Clifford, on the whole, liked better than her former phase of unmingled cheer because now she understood him better and more delicately, and sometimes even interpreted him to himself. Her eyes looked larger, and darker, and deeper; so deep, at some silent moments, that they seemed like Artesian wells, down, down, into the infinite. She was less girlish than when we first beheld her, alighting from the omnibus; less girlish, but more a woman."