Mark 14:11

they were glad They shuddered not at the suggested deed of darkness. His proposal filled them with joy.

and promised How much he expected when he went over to them we cannot tell. But by going at all he had placed himself in their hands. He had made his venture, and was obliged to take what they offered. Thirty pieces of silver(Matthew 26:15), the price of a slave (Exodus 21:32), were equivalent to 120 denarii = 120x7½ d. = about £3. 13 s. of our money. At this time the ordinary wages for a day's labour was one denarius; so that the whole sum amounted to about four months" wages of a day labourer. It is possible, however, the sum, which seems to us so small, may have been earnest-money.

conveniently That is without raising the hostility of the populace, and possibly after the conclusion of the Passover and the dispersion of the Galilean pilgrims to their own homes.