hi, I can't give you an answer to your query (the reason's at end of this post) but here's the starting point of another way to approach your question:
firstly, to take a step back, a lot of the composition books say that you shouldn't be trying to translate the words but to write the sense in latin.
so, thinking just about the sense, the bit of your phrase that you are struggling with contains (1) a fixed year (the year he died) and (2) an "until" phrase (until his death).
the next step for me is to think about each of these concepts (not about the words, but about the concepts – i.e. expressing a fixed year, expressing "until") and try to remember from your own reading how you have seen them expressed by latin writers whose style you are trying to reflect.
firstly the fixed year. When I think of how e.g. caesar and cicero refer to a fixed year, the first thing i remember is how they often refer to a consular year in the ablative, e.g. cicero pro archia 5: ROMAM VENIT MARIO CONSVLE ET CATVLO
, Caesar BC book 1 section 2: IS, M. MESSALA M. PISONE CONSVLIBUS
, REGNI CVPIDITATE INDVCTVS…
so for the fixed year, follow that approach – put the year in the ablative. (you see how this gets you to a different place than your proposed apposition in the accusative, which could lead to confusion as possibly the accusative of duration…)
the other concept to reflect is the "until" bit. just thinking about the sense – and one way to start this is to think of a verb that generally expresses the idea – "until his death" means generally until he died (changing the noun to a verb). so we need to think of how caesar and cicero said generally "until" + a verb. one way is DVM + subjunctive - see:
- woodcock's a new latin syntax, s222 on pg 181: http://books.google.fr/books?id=WmT6mS5 ... &q&f=false
- the paragraph of the LS article on DVM that begins "In immediate succession": http://archimedes.fas.harvard.edu/cgi-b ... lter=CUTF8
NB now that we have separate DVM clausewith the verb for "died" embeded in it, there's no confusion that the ablative expression ANNO modifies the verb for "ruled" (which i understand was your concern with ANNO in your original post above).
this would give something like: IS, AB ANNO 1665 DVM ANNO 1675 SIT MORTVVS, REGNAVIT.
this isn't enough though - just writing a latin sentence that appears to meet the rules for grammar, syntax, idiom etc. isn't enough - the final and most time consuming step isto read through your chosen model authors and see if you can find them using similar ways of expressing themselves - if not, perhaps there's a completely different way that latin writers wrote the idea, which you need to investigate - this means you've just learnt something important from composition.
for me the only purpose of composition is to bring you closer to the classical texts, and so this final step, plus the earlier step above of trying to remember how authors express certain concepts, are the most valuable steps of composition – the actual output in latin or grk that i produce is of no value, it's the process of linking my thoughts back to what i have read that makes composition valuable for me.
on this point (the act of composition involving lots of thought about the link between your writing and the classical models) i really like the idea i once read, that the papal secretary pietro bembo (lived 1400s to 1500s) when writing latin, kept 40 portfolios - he started by writing his draft latin composition on a piece of paper and put it in the first portfolio. then later he'd take it out, think about whether it closely followed his models or not (and if not, he'd correct it) and then put it into the second portfolio, and so on. so when the paper finally emerged from the last of the 40 portfolios, he has thought through lots of times how closely his composition reflected how the ancient authors wrote – i.e. the bulk of his time composing was not spent in the writing bit but thinking about the ancient writers and whether his compositions followed their example.
the reason i said above that i can't properly answer your query however is that i unfortunately don't currently have time to do this last step for you, i.e. read the authors in a close way to find similar expressions to the e.g. latin sentence that i drafted above – so i wouldn't trust the sentence that i drafted above, but it could start as a base for investigating further in classical texts to see if something like it could work.