they started to build a library, where they would keep these letters, and sort them and when charles francis adams sorted the letters in the 1830's and 18 40's, this is abigail's and john's grandson, the son of john quincy, he threw out a lot of abigail's letters from her friends. which is painful to us women today because he said, those aren't really important. the important letters are the historical ones between the adams. so a lot of her correspondence with her friends was lost. but they were very careful, the adams family was very careful to keep all of those letters. and it -- they were sorted by every generation was given the responsibility of sorting and then binding the letters and they did that. they sorted them by dates and put them into bound volumes. in 1954, the adams family burned with not just abigail's and john's letters, but four generations of adams letters, gave all the letters to the mishistorical society. the first thing the mishis tore l cool society did was microfilm all of the letters, so that there was a permanent record. you remember microfilm, it came in the 19 50's an