What’s unusual about this sentence by Harry Mathews?

Once brought into this country, partly imprudent gray barbers marry expatriate, parrying the frictions of tried friends such as Mary, the sorry crook with no work at hand, who is now without a murmur getting pastry.

It remains a sentence when you remove the Rs:

Once bought into this county, patly impudent gay babes may expatiate, paying the fictions of tied fiends such as May, the soy cook with no wok at hand, who is now without a mumu getting pasty.