I don't know how helpful this will be, but I grew up in Rye New Hampshire and there is a single grave marked Samuel B. Marden on land formerly owned by some Rands. I don't know if this is the Samuel Marden you're looking for, but some of the descendants of that family are named Reardon. I noticed your message because an old friend and I have taken an interest in local Rye history, and that name Samuel B. Marden came up because of the headstone we noticed as children. I was on this forum looking for information about him. If I find anything out, I'll be sure to let you know.