| Common name of letter | Registrum VII, 27 | ||||
| Page in Caspar's edition | 508 (â–ºdMGH) | ||||
| Number in JL | 5170 | ||||
| Type of document | (Normal) letter | ||||
| Abstract (from Caspar's edition) | Gregory VII exhorts Robert Curthose to obey his father, King William I of England. | ||||
| Place of issue | Rome | ||||
| Date of issue | 1080 May 08 | ||||
| Address lines | GREGORIUS episcopus servus servorum Dei Roberto filio regis Anglorum salutem et apostolicam benedictionem | ||||
| Incipit | Certi rumores tuorum... | ||||
| Datum line | Data Rome VIII Idus Maii [I]ndictione III | ||||
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