I haven't looked closely into this, but it occurs to me that Eyton
mistook Mauduit as the married named of the widow Adelicia when this may
have been actually her own family surname - in other words, she may have
been the widow of William de Pont l'Arche who was chancellor after the
death of his father-in-law Robert Mauduit.
According to Mason, William de Pont l'Arche and his Mauduit wife had a
son named Robert. She didn't list others named William, Henry and Ralf
but then she didn't ascribe these sons to any of the Mauduit Williams
either.
However, the Mauduit wife of William de Pont l'Arche was named Constance
in Mason's chart, not Adelicia, and was unnamed in Eyton's article.
Perhaps Adelicia was an alternative name of hers, or perhaps the Lewes
cartularist miscopied the charter dated 1170/71.
Here is the text of the Lewes priory charter as printed by Eyton:
"Convencio inter Willielmum Priorem de Lewes et Adeliciam Malduit et
filios ejus, Robertum, Willielmum, Radulfum, et Henricum. Adelicia et
filii ejus dederunt Priori, &c. terram in Lundon in parochia Sancti
Thome pro qua Conventus de Lewes prius reddebat octo solidos (annuatim),
tenendam de eis pro quatuor solidis (annuatim). Prior, de caritate
Ecclesise (suae) dedit Adelicie triginta solidos et unicuique filio
(suo) unum bisancium. Ecclesia de Lewes anniversarium Willielmi
(Malduit) Camerarii, viri Adelicie, singulis annis suscepit agendum,
similiter et Adelicie post obitum suum. Facta est haec convencio anno
primo Henrici Regis junioris filii Regis Henrici, presentibus Abbatibus,
Laurencio Abbate de Westmonasterio, Willielmo Abbate de Rames'. Hiis
testibus Roberto Clerico de Ram'."
The words in parentheses were evidently added by Eyton, and consequently
Adelicia's deceased husband is not surnamed Mauduit in the cartulary
version of the charter. This is reinforced by Louis Salzman's
translation of it in *The Chartulary of the Priory of St Pancras of Lewes*:
"This agreement was made between William, Prior of St Pancras of Lewes
and Adelicia Malduit and her sons Robert, William, Ralph and Henry,
namely that Adelicia and her sons just named have given to the church of
St Pancras certain land in London in the parish of St Thomas for which
the said church formerly paid 8s. to hold of them for 4s. yearly, namely
2s. at Easter and 2s. at Michaelmas. For this gift the Prior has given
of the bounty (caritate) of the church to Adelicia 30s. and to each of
her four sons one bezant. Moreover the said church has under taken to
keep the anniversary of William the Chamberlain (Camerarii), husband of
the said Adelicia, every year, and likewise that of Adelicia herself
after her death. The church shall hold the aforenamed land freely and
honourably by the annual rent of 4s. for all service. This agreement was
made in the first year of the younger King Henry son of King Henry, in
the presence of the abbots Laurence Abbot of Westminster, and William
Abbot of Ram[sey]. Witnesses: —Robert the clerk of Ram[sey], William le
Afemed, Roger the Chamberlain (Camer') of the Abbey of Westminster,
Richard de B[er]ching', Ralph de Mulesh[am], Alored de Teleburi."
Lewes priory was something of a production centre for forgeries, and
although this doesn't appear to be one of them it may have been copied
into the cartulary from an exemplar of the original in poor condition,
or that had been recreated after damage, or for any number of other
reasons changed the name of the widow from Constance to Adelicia.
But this is just a guess on my part, as I have not studied the question.
Peter Stewart