There are 3 titles associated with this firm.

Campbell , D.P. (1811). Poems by d.p. campbell. Inverness: John Young [Inverness]
Campbell , D.P. (1811). Poems by d.p. campbell. Inverness: John Young [Inverness]
Campbell , D.P. (1811). Poems by d.p. campbell. Inverness: John Young [Inverness]