полностью

“‘I don’t think that we should have much difficulty in determining that (не думаю, что у нас будет много затруднений в определении этого = думаю, это мы выясним без особого труда),’ said I; ‘with your permission we will take the first train down to Sussex (с вашего позволения, мы первым /же/ поездом отправимся в Суссекс; to permit — позволять, разрешать), and go a little more deeply into the matter upon the spot (и вникнем в дело немного глубже на месте).’

occasion ['ken], chart [:t], rigmarole ['rmrul]

“‘It is very possible. We took no pains to hide it.’

“‘He simply wished, I should imagine, to refresh his memory upon that last occasion. He had, as I understand, some sort of map or chart which he was comparing with the manuscript, and which he thrust into his pocket when you appeared.’

“‘That is true. But what could he have to do with this old family custom of ours, and what does this rigmarole mean?’

“‘I don’t think that we should have much difficulty in determining that,’ said I; ‘with your permission we will take the first train down to Sussex, and go a little more deeply into the matter upon the spot.’