https://www.google.ch/books/edition/Manual_of_Domestic_Economy_Suited_to_Fam/xUcI3j4lQXIC?hl=en&gbpv=1&dq="if,+very+early+after+birth,+that+is,+by+the+second+week,+they+are+left+to+go+to+sleep+in+their+cots"&pg=PA565&printsec=frontcover