https://digital.library.yale.edu/catalog/10189885
AL initialled 'R' to William [Maxwell Hagerston] Constable of Evreringham, Nancy. - Yale University...
https://archives.bodleian.ox.ac.uk/repositories/2/archival_objects/838522
Note of Falk's comments, initialled W.M. (W. Morgan), n.d. | Bodleian Archives & Manuscripts
https://ec2-15-222-56-132.ca-central-1.compute.amazonaws.com/definition/initialled
initialled - Definition and Meaning
verbSimple past tense and past participle of initial.
definitionmeaning