What is associated with: columbus first sighted this venezuelan river in 1498 but it wasnt explored until 33 years later?

What is referred to by 'columbus a speedy message'? Based on the clue 'columbus carried a letter from ferdinand to the gr...', what is the answer? Based on the clue 'columbus discovered the new world during this mont...', what is the answer? Based on the clue 'columbus first landing on the mainland of the amer...', what is the answer? Based on the clue 'columbus first voyage to the new world ended in th...', what is the answer? Based on the clue 'columbus flagship on the first transatlantic trip', what is the answer? Based on the clue 'columbus made his fourth final voyage to the new ...', what is the answer? What is associated with: columbus may have spotted the mouth of this venezuelan river in 1498?