This paper reports on the results of multicast latency and round trip time measurements for a particular deployment of nodes forming a Wi-SUN FAN 1.0 [1] network. The authors have explored in detail the behaviour of the WiSUN FAN network used by Hee-Jun Lee and Sang-Hwa Chung, the authors of a prior paper [2], in order to provide more detail regarding the latencies and delays cited in that paper. We provide details regarding:the timing of the component requests and responses that comprise the Lee and Chung round-trip and latency measurements, andadditional timing and packet delivery ratio results for variations of the MPL [3] retransmission parameters for the Wi-SUN FAN protocol used on the Lee and Chung test network.