One-dimensional (1D) spin chain is important for understanding low-dimensional magnetism and useful for advancing quantum communications. In the present proposal we are investigating magnetism of Ca3Cu1-xMn1+xO6 (x = 0.00 & 0.07) compounds using muSR measurements. The preliminary analysis of the µSR data show the relaxation is apparently Kubo-Toyabe (KT) type; however, it is not a simple KT fit when temperature is varied. The repolarization curves at various temperatures show that there are two mid-points, which indicate that there are two stopping sites, or two magnetically inequivalent sites in this compound, in very good agreement with our neutron diffraction results. In this continuation proposal we propose to carry out zero field (ZF) and transverse field (TF, 100G) dependent study on Ca3CuMnO6 and Ca3Cu1-xMn1+xO6 (x = 0.07) samples.