'Oh yes, but I can't quite explain,' said Celestina, looking rather puzzled. 'Father showed it me with the candle and a little round globe we've got, but I'm afraid I couldn't tell you.' 'Could the old man tell it?' asked Biddy. 'I would so like to go to see him. Don't you think we might some day?' 'Perhaps,' said Celestina. 'When the summer comes perhaps your papa would take you in a boat. Lots of ladies go out to the lighthouse in the summer. It's too cold in a boat in winter.' 'But I don't mean in a boat,' said Bridget; 'I mean walking. I'm quite _sure_ we could jump over the little bit of water if we gave a great big jump. I once jumped over a whole brook at grandmamma's--I did really.' 'It's much bigger than that--it is indeed. You don't understand,' said Celestina. 'If you'd ask your papa he'd tell you, I daresay. But I think we must be going home now. I'm sure it's time.' 'I'm sure it isn't,' said Biddy crossly. 'We haven't talked about the dolls at all yet, and I want you to tell me more about that funny place where the snow is.' 'I'll try to think of more to tell you if your mamma will let you go out with me another time, and I'd like dearly to show you my dolls' room if you could come to our house one day,' said Celestina. 'But we must go home now, Miss Biddy.' Bridget flounced about, looking very much put out. 'I'm not going yet. I don't want to go in,' she said. Celestina began to look troubled. Then her face cleared. '_I_ must go home,' she said, 'whether you do or not. I wouldn't for anything have mother worrying about me. You wouldn't like your mamma to be worrying about you, would you, Miss Biddy?' 'I daresay she wouldn't care; I'd only get a scolding, and I don't mind much,' said Biddy, who had got on to a very high horse by this time. Celestina stopped short and looked at her. She could not understand Biddy at all. 'Mother never scolds me, but I'm very unhappy when she's not pleased with me,' she said gently; 'and I'm sure your mamma's very kind and good. I'm sure she does care about you a great deal.' Her words reminded Bridget of what had happened that very afternoon. Perhaps what Celestina said was true: mamma had pressed her hand when she said she was sorry. With one of the quick changes of mood which seemed so strange to Celestina she turned suddenly. 'I'll go home,' she said. 'Come on, Celestina, before I get naughty again. But it isn't all for being good. It's a great deal that I want to come out with you again, and perhaps I mightn't if I was late to-day.' 'No. Very likely your mamma would think I made you disobedient,' Celestina replied; 'and I shouldn't like her to think so.' 'If I might go into the kitchen and get the tea ready for papa and mamma like you do, I'd never want to stay out late,' said Bridget thoughtfully. Celestina considered.