 Typical of this is his appointment in 1887 as Consulting Architect to the Charity Commissioners for whom he produced a great report on the City of London churches which was said to be 'the most complete account [of them] ever written'.Christian personally inspected the 54 churches, strenuous and sometimes dangerous work, undertaken when he was over 70 years old.Christian carried out restoration work on several of these churches, a notably restrained and respectful one being that of 1892–95 to Sir Christopher Wren's St Martin Ludgate on Ludgate Hill.