| Repository | Jesuits in Britain Archives |
| Ref No | ABSI/SJ/51/9 |
| Title | Fiction |
| Date | [1930s] |
| Level | Series |
| Description | A collection of detective stories written under the pseudonym John Bullivant and Lynn [or Llyn] Cooper. These are assumed to have been authored by Walker, although no mention of this is made in his obituary. |
| AccessConditions | The papers are available subject to the usual conditions of access to archive material in the Jesuits in Britain Archives. |