2D What Pavlov studied - C?n?i?i?n?r ?e?l??
6D London Thoroughfare - R?m?n? Street
22D Book written by the Grossmiths - T?? ?i?r? ?? a ?o?o?y
46D Return of an investment - ?e? o?f
23D Knowledge of mysteries - ?n?s?s
42A Wild area of southwest England - ???o?r
REGENT STREET. The Diary of a nobody PAYOFF gnosis and EXMOOR.
dO YOU KNOW THE ANSWER TO 2D, IT COULD EITHER BE CONDITIONER or CONDITIONED, WHICH WOULD MAKE 28A either muddy or murky.