See wikipedia: James, son of Zebedee for when and Life of Jesus Christ, Vol 3, p 168, for where.
A. K. Emmerick says in Life of Jesus Christ, V 4, p 450 that James was killed in the 12th year after Jesus' death or between 46 and 47 years after Jesus' birth which means Jesus must have been 35 at death. Here she says he was not present at Mary's death.
Beheaded on orders of King Herod Agrippa I. See Wikipedia and Acts 12:1-2. Present at Mary's death (Life of the Blessed Virgin, p 216-230) meaning she could not have died after AD 44 and Jesus not after AD 31 if she died 13 or 14 years after the Ascension.
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