"[Pope] Nicholas saw his chance. At once he dispatched two more bishops to the Bulgarian court with meticulous answers to every one of the 106 items in [Tsar] Boris's questionnaire, making all possible concessions permitted by canon law and, for those that could not be granted, explaining the reasons for his refusal. Trousers, he agreed, could certainly be worn, by men and women alike; turbans too, excepting only in church. When the Byzantines maintained that it was unlawful to wash on Wednesdays and Fridays, they were talking nonsense; nor was there any cause to abstain from milk or cheese during Lent. All pagan superstitions on the other hand were forbidden, as was the Greek practice of divination by the random opening of the Bible. Bigamy, too, was out.
The Bulgars were disappointed about the bigamy, but on the whole more than satisfied. Boris cheerfully swore perpetual allegiance to St Peter and, with every sign of relief, expelled all Orthodox missionaries from his Kingdom. Their Catholic counterparts were not slow in coming."
- A Short History of Byzantium, John Julius Norwich.