The object of sec. 10 on its face is to make the person who may be called the secondary or ultimate employer, and the person who is the immediate employer, jointly and severally responsible in cases of injury to workmen employed by the latter, subject to indemnification of the former by the latter against the liability created by the section. Take the position which arises when a workman, A., injured in the service of a sub-contractor, B., finds that his immediate employer is a man of straw, and that the principal contractor, C., with whom his immediate employer has contracted for the execution of the work wholly or in part, meets his demand for compensation with the reply, "Oh, you are not my employé but B.'s - it is he who must pay." In such a case the employé, A., may sue B. and C. together, or he may sue either B. or C. separately; but if he recovers against them jointly or against C. separately, C. is entitled to be indemnified by B. against the liability. But I do not think the state of things contemplated by the section arises unless B.'s contract is to do something for or on behalf of C. In other words, the section does not impose liability on anyone who is not the principal of the immediate employer, either as his employer, or as the principal contractor, or as his principal, as that term is used in the relation of principal and agent. The object of the section is to facilitate the recovery of compensation by workmen. For instance, the relation of partnership is not within the section so as to advance the workman's remedies against a co-partner of his immediate employer to an extent greater than those secured to him by the rest of the Act, under which he is at liberty to enforce the liability of all the partners to him. But where his immediate employer is the agent of a principal, or the employé of one, or a sub-contractor under one, then the fuller remedies enumerated in the section are available, with the qualification in favor of the principal afforded by sub-sec. (2). Hence, if the appellant and Rano were partners by or under the agreement proved, the respondent was right in suing them jointly, and did not require the help of sec. 10 to enable him to recover. If they were not partners, but Rano was under the agreement the employé or agent of the appellant, then sec. 10 enables the respondent to sue the appellant and Rano jointly, as he has done, and to recover from both of them; and the appellant's only recourse is his right of indemnity against Rano. The construction contended for by the respondent would expose to liability at the suit of a workman who has suffered injury "arising out of and in the course of his employment," such a person, for example, as a landowner for whom a contractor employing the workman is building a residence, or as a shipowner for whom a shipbuilder is building a ship. That construction is, I think, disposed of by sec. 3, which limits the operation of the Statute to cases in which the work, in the course of which the employé suffers injury, is carried on "by or on behalf of" the employer and "as part of his trade or business." In the cases I have enumerated and their like, the work is carried on by and on behalf of the contractor, or the shipbuilder, as the case may be, and the interest of each of these persons is separate from and independent of the interest of the landowner, or the shipowner, or their like. It is only in a special and secondary sense that the first of these is building a house, or the second is building a ship. These operations are not carried on by or on behalf of either of them "as part of his trade or business," for it is not the business of a landowner as such to build houses, or of a shipowner as such to build ships.