| Common name of letter | Ep. vagans 67 | ||||
| Page in Cowdrey's edition | 151 | ||||
| Number in JL | 5277 | ||||
| Type of document | other | ||||
| Abstract (from Cowdrey's edition) | An insistence that truth is superior to custom. | ||||
| Date of issue | between 1073 June 30 and 1085 May 25 | ||||
| Incipit | Si consuetudinem fortassis opponas... | ||||
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