Feltham states:
"Castletown is the residence of John Lace, Esq. the deemster for the southern district. [See pages 36, 144.] John F. Crellin, Esq. deemster for the northern district, resides at Orrisdale. The former I had not the honour of knowing; but of the hospitality and politeness of both Mr. and Mrs. Crellin, every stranger, who visits that part of the island, must bear the most grateful and pleasing testimony."

I dont think he intends to say that the Crellins dwelt in the south - they have been at Orrisdale it seems since the days of Orry! - Feltham probably assumed that only one Orrisdale (must admit I would have only thought of the one just northward of Kirk Michael