Scripture Query and Answer: Luke 9:3 Compared With Mark 6:8

Q. -Will you kindly answer the following question?—In Luke 9 the Lord told the disciples not to take a staff when sending them out; whereas in Mark 6:88And commanded them that they should take nothing for their journey, save a staff only; no scrip, no bread, no money in their purse: (Mark 6:8) He says, “Take nothing... save a staff only.” Can you say why the two Evangelists differ?
A. -If the enquirer has access to vol. 9 (N.S.) of the Bible Treasury (1913) he will find on page 356 what, we think, may be a solution of his difficulty.