My Dear Armstrong / I'll be with you / at 6 or a little before / - sorry about poor old Stanhope / but will have a merry evening / and drink to his recovery / (in dill water) - no, I / haven't seen P? Dominus / nor indeed, any play for / many a day. - / everyouraffec / EBJ
Possibly to Thomas Armstrong (1832-1911), the painter, as Stanhope is mentioned.