diff --git a/src/Phsyche.package/Phsyche.class/instance/eval..st b/src/Phsyche.package/Phsyche.class/instance/eval..st
new file mode 100644
index 0000000..e86f908
--- /dev/null
+++ b/src/Phsyche.package/Phsyche.class/instance/eval..st
@@ -0,0 +1,3 @@
+as yet unclassified
+eval: expression
+	^ self eval: expression in: nil
\ No newline at end of file
diff --git a/src/Phsyche.package/Phsyche.class/instance/eval.in..st b/src/Phsyche.package/Phsyche.class/instance/eval.in..st
new file mode 100644
index 0000000..d563e43
--- /dev/null
+++ b/src/Phsyche.package/Phsyche.class/instance/eval.in..st
@@ -0,0 +1,3 @@
+as yet unclassified
+eval: expression in: anEnvironment
+	^ expression
\ No newline at end of file
diff --git a/src/Phsyche.package/Phsyche.class/instance/parseAndEval..st b/src/Phsyche.package/Phsyche.class/instance/parseAndEval..st
new file mode 100644
index 0000000..7d85bf1
--- /dev/null
+++ b/src/Phsyche.package/Phsyche.class/instance/parseAndEval..st
@@ -0,0 +1,3 @@
+as yet unclassified
+parseAndEval: anExpression
+	^ self eval: (self parse: anExpression)
\ No newline at end of file
diff --git a/src/Phsyche.package/PhsycheTest.class/instance/testEvalBoolean.st b/src/Phsyche.package/PhsycheTest.class/instance/testEvalBoolean.st
new file mode 100644
index 0000000..9dfa23b
--- /dev/null
+++ b/src/Phsyche.package/PhsycheTest.class/instance/testEvalBoolean.st
@@ -0,0 +1,4 @@
+tests
+testEvalBoolean
+	self assert: (ph parseAndEval: 'true') equals: true.
+	self assert: (ph parseAndEval: 'false') equals: false.
\ No newline at end of file
diff --git a/src/Phsyche.package/PhsycheTest.class/instance/testEvalEmptyList.st b/src/Phsyche.package/PhsycheTest.class/instance/testEvalEmptyList.st
new file mode 100644
index 0000000..7bc4dc8
--- /dev/null
+++ b/src/Phsyche.package/PhsycheTest.class/instance/testEvalEmptyList.st
@@ -0,0 +1,3 @@
+tests
+testEvalEmptyList
+	self assert: (ph parseAndEval: '()') equals: #()
\ No newline at end of file
diff --git a/src/Phsyche.package/PhsycheTest.class/instance/testEvalNumber.st b/src/Phsyche.package/PhsycheTest.class/instance/testEvalNumber.st
new file mode 100644
index 0000000..49f4916
--- /dev/null
+++ b/src/Phsyche.package/PhsycheTest.class/instance/testEvalNumber.st
@@ -0,0 +1,4 @@
+tests
+testEvalNumber
+	self assert: (ph parseAndEval: '12') equals: 12.
+	self assert: (ph parseAndEval: '3.14') equals: 3.14.
\ No newline at end of file