The first five viscounts ( including Henry Dundas ) are buried in a simple vault ( gated but unlocked ) in Old Lasswade Kirkyard .
The family seat is Melville Castle between Dalkeith and Lasswade .
The first five viscounts ( including Henry Dundas ) are buried in a simple vault ( gated but unlocked ) in Lasswade     .
The family seat is Melville Castle between Dalkeith and Lasswade .