The WIP - provisionally titled Masquerade on the Riviera - is in the third and I hope the last phase. I have 310 pages of typescript and just over 86,000 words.
Now I do the toothcomb bit.
Proof checking - of course. I use dictation software to get the words from hand written to typed, so there are always a few words missing or incorrect phrases along the way, although I usually scoop up the real howlers when it gets its first check on the machine. I know that in this manuscript one of the the supporting characters has two different spellings of his name, depending what sort of mood I and the machine were in at the time, and as I also changed his name when I was editing, as it sounded too like another character, there may well be three to pick up. There are a few XXs in there too where I couldn't remember what I'd called minor players.
I will be editing, naturally, to make sure everything adds up and ties together and most important, the time line stands up, and to polish the words so that it is fit to be let out.
The last thing, which I am borderline obsessive about, is fact checking. You can't know everything, and it is often pointed out among writers that the worst hazards are the things that you don't know you don't know, but I might add the ones that you do think you know can be a problem too. I do my best to check everything, which takes time, but worth it.
The manuscript that leaves the building has to be the best I can make it, on this stage of the journey. Fingers crossed this time it won't be tooooo long!