Their ad in the newspapers started a flood of letters - more than one hundred a day.

VOA: special.2010.04.24

All the information in its genes is organized into more than one million letters.

VOA: special.2010.07.20

When finished,the cell contained more than one million letters.

VOA: special.2010.07.20

Each watermark has more than one thousand letters.

VOA: special.2010.07.20

Letters from America brought many more immigrants.

VOA: special.2010.05.13