Research Notes:

"Hadvise et Radulfi filii eius" donated land "in episcopatu Ambianensium apud Mers" to Saint-Victor-en-Caux by undated charter (a copy of which is attached to a late-12th century transcription of a charter under which Hugh de Mortimer confirmed donations to the monastery).

He succeeded his father as Lord of Wigmore, and of other land in Herefordshire and Shropshire. Domesday Book records “Ralph de Mortimer” holding land in Buddlesgate and Barton Hundreds in Hampshire; land in Berkshire including Brimpton in Thatcham Hundred; Idbury in Oxfordshire; Wigmore castle and other properties in Herefordshire; numerous places in Shropshire. Florence of Worcester records that "Beornardus de Novo Mercatu, Rogerius de Laceio…Rawlfus de Mortuo Mari…cum hominibus comitis Rogeri de Scrobbesbyria" threatened Worcester with an army of Normans and Welsh, dated to [1088]. Orderic Vitalis records that “Rodbertus Aucensium comes et Gauterius Gifardus et Radulfus de Mortuomari” and nearly all the seigneurs who lived “trans Sequanam usque ad mare” joined King William II against his brother Robert Duke of Normandy and received considerable sums to fortify their castles, dated to [1089/90]. "Stephen count of Aumâle" donated property to the abbey of Saint-Martin-des-Champs, Paris with the consent of "Hauisa his wife and her father Ralf de Mortuomari" for the souls of "…Milesenda his wife deceased" by charter dated to [1100]. Orderic Vitalis named "…Radulfus de Mortuomari" among the supporters of King Henry I in 1104.

A manuscript narrating the foundation of Wigmore Abbey records that it was founded by “Radulpho de Mortuomari”, adding in a later passage that he died “pridie Non Aug 1100”. The year is incorrect, as shown by Orderic Vitalis´s record of Ralph in 1104. The Lindsey Survey, dated to [1115/18], records "Ralph de Mortimer" holding land in Wootton. It is possible that Ralph survived much later than this date, although no later record has been found which names him. This possibility appears to be corroborated by the manuscript narrating the foundation of Wigmore Abbey which records that “Radulpho de Mortuomari…filium juniorem…Willielmum” was installed by his father as “dominum de Netherleye”. This passage, assuming that it is accurate, shows that Ralph must have survived at least until William was of the age to have been granted this property. If Ralph [I] did survive after 1104, it would extend the possible range during which his son Hugh [II] could have been born, which could contribute towards resolving the chronological difficulties associated with Hugh´s life.... Ralph was certainly dead some time before 1130, the dating of a charter under which "Giroldus abbas S. Luciani Bellovacensis" confirmed the foundation of the abbey by Ralph´s son-in-law "Stephano comiti Albæmarlensi", witnessed by his son "…Hugone de Mortuomari…". Hugues Archbishop of Rouen confirmed donations to Saint-Victor-en-Caux, including property "apud Wellas" {Veules, commune de Saint-Valéry} in "feudo Hugonis de Mortuo mari" and property "apud Sanctum Victorem ex dono Radulfi de Mortuo mari et filii eius Hugonis", by charter dated 1137. ¹