The sentence is not correct. The phrase "took him off" is a verbal phrase which means "he was removed from something" Such as "We took him off the plane", meaning we removed him from the plane. There are two parts to this sentence. The first is "He was only once crossed" The second is different because of the word "and". That means that something else happened either at the same time, or after, before, during, etc...
The only thing we know is that "He" is a male. Also he was mad ("crossed" has two meanings--at an intersection or becoming mad. We know nothing else about this male except when he became mad--it was after a person's father became ill.
"Towards the end" means near the end of the time period. For example "towards the end of the test".
Far gone is a verbal phrase. This means a preposition and verb together that have special meanings. NOT actual meanings. In this case "far gone" means too late for something to happen. Example, "he was far gone from his injuries" Meaning he could not be saved. The injuries were too bad.
Christopher B. Kuch, PhD.