In his will dated 1433, he bequeathed money for the preservation of the head of St Piran in the chapel at Perranzabuloe.

In February 1405, as ‘King’s knight’, Arundell was appointed as Captain of Marck, one of the Calais outposts, this included the castle and town with all lands, fisheries, franchises and perquisites outside the liberty of Calais were granted to him for life.

[2] He served in the navy 1418–19; married Annora Lambourn of Perranzabuloe, which brought to the Arundells several more Cornish manors.

Arundell made financial arrangements in his will that would maintain a chantry of five chaplains and a clerk at St Columb Major.

He also left money to build a chapel in the parish church of St Columb Major to house his own tomb.