The Rev.Hugh Price Hughes is authority for the statement that beds are let on the three-relay system--that is, three tenants to a bed, each occupying it eight hours, so that it never grows cold; while the floor space underneath the bed is likewise let on the three-relay system.

Health officers are not at all unused to finding such cases as the following: in one room having a cubic capacity of 1000 feet, three adult females in the bed, and two adult females under the bed; and in one room of 1650 cubic feet, one adult male and two children in the bed, and two adult females under the bed.
Here is a typical example of a room on the more respectable two-relay system.

It is occupied in the daytime by a young woman employed all night in a hotel.

At seven o'clock in the evening she vacates the room, and a bricklayer's labourer comes in.

At seven in the morning he vacates, and goes to his work, at which time she returns from hers.
The Rev.W.N.Davies, rector of Spitalfields, took a census of some of the alleys in his parish.