SOLVED. Romance, woman bethroved to heir but lost cousin appears, travel over seas to find proof of heritage [s]

[Ashaktis]

Grandma recognizes stranger from portriat of favorite son. They travel somewhere to find a book to prove who he is. The stranger burns it so the current heir can keep position but his honor will not let him. Current heir is very close friends with a maid at his home and at one point kisses her but she had already fallen in love with the stranger before they knew who he was.

[Dee]

it possibly sounds like The Lost Duke of Wyndham and then the second one is Mr. Cavendish, I Presume

[Ashaktis]

That is it! Thank you so much

[Lobstergirl, au gratin]

Which one, Ashaktis?

[Ashaktis]

Both are correct

[Dee]

Lobster girl - it's a duology