H.M.S., Her (or His) Majesty’s steamer, ship, or service.
H.R.H., His (or Her) Royal Highness.
H.S.S. (L. historiæ societatis socius), Fellow of the Historical Society.
ib., ibid. (L. ibidem), in the same place.
id. (L. idem), the same.
i. e. (L. id est), that is.
I.H.S. (L. Iesus Hominum Salvator), Jesus the Saviour of Men.
incog. (L. incognito), unknown.
in lim. (L. in limine), at the outset.
in loc. (L. in loco), in its place.