I had thought that perhaps Lady Russell's deference to Sir Walter based on his rank (and considering their current friendship), her views on Anne and Frederick may not have been inspired by observations on her friend's situation. But could she have been entirely blind to the disparity between her friend and Sir Walter? She is able to see how intellectually isolated Anne is in that house. Is it impossible for her to respect Sir Walter, while still able to see the unhappy situation her friend was in? Does she think that the advantages of Sir Walter's rank outweighed the disadvantages - if so, Lady Eliot may have been even lonelier amongst her adult companions. I suppose I'd have to get to know Lady Russell a bit better. Currently she appears to fluctuate between superficial and profound viewpoints.