Behold, this have I found, saith the Preacher, laying one thing to another, to find out the account;

“Behold,” says the Teacher, “I have discovered this by adding one thing to another to find an explanation.

See, this I have found, said the Preacher, one to one, to find out the reason

See this which I have found, saith the Preacher, [searching] one by one to find out the reason;