With regards to Ancestry vs FindMyPast, I'm afraid it's swings and roundabouts. For example, FindMyPast has outbound passenger lists, whilst Ancestry has inbound passenger lists

I subscribe to both, which can get a wee bit pricey, but I justify it that since we've had our son, we don't have a social life so the money that would have been spent going out is now spent looking for rellies!
I'm guessing that Harry and Ernest might have emigrated, but I would post a question on the relevant emigration board and see what those clever people can come up with!