Remember, if you haven't used our clues pages yet, check out the instructions here to learn how they work and how to best utilize them.
Hint 1
I love these colors. Do they match any others?
Hint 2
Pick your palette carefully. Do I have to spell it out for you?
Hint 3
Letter by letter, we'll paint this picture.
Hint 4
Not every color of paint is needed to find this solution.
Solution
The colors of the letters in 'Knowledge' correspond to the lettered paintbrushes on the back of the card. When matched by color, 'Knowledge' becomes 'Manhattan'.
Hint 1
These paragraphs are exactly the same... except for those strange stains.
Hint 2
The stains are roughly in the same area, but not quite.
Hint 3
Left, Right, and What Comes In-Between.
Solution
The messages on the left and right are identical, but the subtle ink marks behind them are not. The hidden message is in the middle - the left paragraph has the letter to the left marked, the right paragraph has the letter to the right marked. In between each pair of marked letters are the ones that spell out 'Creative Thinking'
Hint 1
For the signatures, it sounds less difficult than what's written.
Hint 2
Sound it out letter by letter.
Hint 3
First name is left, last name is right.
Solution
When said out loud, each word of the signature sounds like a letter of the alphabet. The notes are signed, 'Billy Quort'
Hint 1
These stamps have some vibrant colors.
Hint 2
They paint a beautiful scene.
Hint 3
These stamps offer four letters.
Hint 4
You are looking for a date associated with these letters.
Hint 5
Cross reference with your existing knowledge.
Solution
The colors of the stamps correspond to the lettered paintbrushes, offering 'MOMA'. A quick Google search offers the information that this stands for the Museum of Modern Art, in New York. It was founded in 1929