Wilfrid's difficulties. The Historia Ecclesiastica includes many accounts of miracles and visions. These were de rigueur in medieval religious narrative, but Bede appears to have avoided relating the more extraordinary tales; and, remarkably, he makes almost no claims for miraculous events at his own monastery. There is no doubt that Bede did believe in miracles, but the ones he does include are often stories of healing, or of events that could plausibly be explained naturally. The miracles served the purpose of setting an example to the reader, and Bede explicitly states that his goal is to teach morality through history, saying "If history records good things of good men, the thoughtful reader is encouraged to imitate what is good; if it records evil of wicked men, the devout reader is encouraged to avoid all that is sinful and perverse." Omissions and bias Bede apparently had no informant at any of the main Mercian religious houses. His information about Mercia came from Lastingham, in Northumbria, and from Lindsey, a province on the borders of Northumbria and Mercia. As a result, there are noticeable gaps in his coverage of Mercian church history, such as his omission of the division of the huge Mercian diocese by Theodore in the late 7th century. Bede's regional bias is apparent. There were clearly gaps in Bede's knowledge, but Bede also says little on some topics that he must have been familiar with. For example, although Bede recounts Wilfrid's missionary activities, he does not give a full account of his conflict with Archbishop Theodore of Canterbury, or his ambition and aristocratic lifestyle. Only the existence of other sources such as the Life of Wilfrid make it clear what Bede discreetly avoids saying. The omissions are not restricted to Wilfrid; Bede makes no mention at all of Boniface, though it is unlikely he knew little of him; the final book contains less information about the church in his own day than could be expected. A possible explanation for Bede's discretion may be found in his comment that one should not make public accusations against church figures, no matter what their sins; Bede may have found little good to say about the church in his day and hence preferred to keep silent. It is clear that he did have fault to find; his letter to Ecgberht contains several criticisms of the church. The Historia Ecclesiastica has more to say