It was a pleasure to hear Canon Liddon, than whom, in his day, there was no finer preacher. The only correct solution is to recast the sentences. But perhaps the convenience of than whom is so great that to rule it out amounts to saying that man is made for grammar and not grammar for man. This is strictly the proper place for drawing attention to a question that has some importance because it bears on the very common construction discussed at some length in the gerund section. This is the question whether, and to what extent, compound possessives may be recognized.
Some people say some one else's, others say some one's else.
Our own opinion is that the latter is uncalled for and pedantic. Of the three alternatives, Smith the baker's wife, Smith's wife the baker, the wife of Smith the baker, the last is redolent of Ollendorff, the second thrusts its ambiguity upon us and provokes an involuntary smile, and the first alone is felt to be natural. It must be confessed, however, that it is generally avoided in print, while the form that we have ventured to call pedantic is not uncommon. Fowler, H. W. 1908. The King's English .