Neville had been on the other side of the river, sat under a tree with a book on native plant life he'd gotten in Cuba in one hand while the other held his wand, throwing fish toward the black dragon splashing at the edge of the water.
He'd been aware of Dan arriving, but mostly had just ignored him. He still had a tendency to always keep track of the people around him, but he knew he was (mostly) safe here so was able to pay it little mind. At least until the commotion of the other man flinging himself from the bench and almost rolling toward the river caught his attention.
He threw a fish far off in another direction, making sure it landed in a tree so Ruby would be occupied for at least a few minutes finding it and dropped his book. He walked to the edge of the river and then apparated over it, landing with a pop on the other side.
"You alright mate?" he asked, tucking away his wand and offering a hand instead.