Recover Facebook account where 2 accounts have got confused

I have 2 Facebook accounts. One with 8 friends, one with 128 friends. Till recently, I didn't realise I had the 2 accounts, I thought I only had the 128 friend account, logging into it automatically from my desktop, without knowing my password. Wanting to access it when travelling I tried to get to it on my laptop, but got only to the 8 friend account, which is useless. Attempting one thing after another, I logged out of the 128-friend account on my desktop, and found I could not log back in. When I asked for a replacement password, I didn't get it (maybe it goes to a now-discountinued email address, who knows?) I tried several times and several alternative ways, but no joy.