I see that your post is from awhile ago so I am not sure if you are still on here very often, but I am hoping you may be able to help me. I saw that you were looking for Malachi's other children and his parents. I am looking for that information also. From what I have found I believe I am the decendent of Benjamin Cummings born in 1790, who was Joseph and Malachi's brother. I have found info on Joseph and Malachi, but not much on Benjamin.
If you can help please let me know.